Stainless Steel Hex Metal-Stop Locknuts – A2-70 & SUS316 Top-Lock Nuts

Stainless Steel Hex Metal-Stop Locknuts – A2-70 and SUS316 All-Metal Prevailing-Torque Nuts

Corrosion-Resistant Top-Lock Hexagon Locking Solutions for Industrial OEM Equipment

JUXIN FASTENERS supplies stainless steel Hex Metal-Stop Locknuts for OEM manufacturers requiring corrosion-resistant threaded fastening solutions and all-metal locking performance.

The original product range identifies A2-70 stainless steel and SUS316 stainless steel, with metric sizes from M5 to M20.

For the top-lock distorted-thread configuration, the locking mechanism is formed through controlled deformation of the upper internal thread region.

When the nut engages a compatible mating bolt, the deformed thread section produces metallic interference and prevailing torque.

This resistance helps oppose unintended nut rotation in appropriately designed mechanical assemblies.

The product has a conventional non-flanged hexagon body.

Unlike nylon-insert locknuts, a distorted-thread metal-stop design does not rely on a polymer insert.

JUXIN FASTENERS supports drawing-based OEM sourcing for mechanical engineers, manufacturing engineers, production managers, 

purchasing managers, supply chain managers and industrial equipment manufacturers.

Product Overview and Technical Specifications

Product Name: Stainless Steel Hex Metal-Stop Locknuts

Commercial Product Name: Stainless Steel Hex Metal-Stop Locknuts

Engineering Name: Stainless Steel Top-Lock Distorted-Thread Hex Locknuts, Subject to Drawing Confirmation

Alternative Industry Names:

• Stainless Steel Metal-Stop Lock Nuts

• Stainless Steel Top-Lock Hex Nuts

• Stainless Steel All-Metal Prevailing-Torque Nuts

• Stainless Steel Deformed-Thread Locknuts

• Stainless Steel Self-Locking Hexagon Nuts

• DIN 980 Stainless Steel Locknuts

Material Options Identified in Original Product Information:

• Stainless Steel A2-70

• Stainless Steel SUS316

Surface Finish: Natural Stainless Steel Finish

Original Listed Metric Sizes:

• M5

• M6

• M8

• M10

• M12

• M14

• M16

• M20

Product Configuration: Non-Flanged Hexagon Nut

Locking Principle for Distorted-Thread Version: Controlled Metallic Thread Interference

Historical Standard Reference: DIN 980:1987

Relevant Modern Standards for Engineering Review:

• ISO 7719

• ISO 7042

• ISO 3506-2

• ISO 2320, Where Applicable

Manufacturing Basis: Approved Customer Engineering Drawing and Technical Specification

Specification Verification

The original product information contains conflicting descriptions of spring-stop and distorted-thread locking mechanisms.

The actual locking structure must be confirmed from the engineering drawing.

A2-70 and SUS316 are also different types of material designations.

SUS316 does not automatically establish a specific nut mechanical property class.

What Are Stainless Steel Hex Metal-Stop Locknuts?

Stainless steel Hex Metal-Stop Locknuts are corrosion-resistant all-metal locking fasteners intended for suitable threaded mechanical assemblies.

For a top-lock distorted-thread design, the locking action comes from controlled deformation of the internal thread near the upper end of the nut.

As the mating bolt advances into the locking region, metallic interference generates prevailing torque.

The locking resistance helps prevent unintended rotation.

The nut's stainless steel construction provides corrosion resistance appropriate to the selected material and service environment.

Potential applications include industrial machinery, pumps, mechanical equipment supports, electrical enclosures, outdoor equipment and selected process equipment.

However, the product must be qualified for the actual joint loads, environmental conditions and customer requirements.

How the Top-Lock Distorted-Thread Mechanism Works

A top-lock distorted-thread nut contains a specially formed locking section near the top of its internal thread.

During installation, the mating bolt first engages the relatively undeformed lower threads.

These threads guide the bolt into alignment.

As the bolt advances, it reaches the distorted locking section.

The interference between the locking threads and mating bolt produces prevailing torque.

Key Engineering Characteristics

• All-metal locking construction.

• No nylon locking insert.

• Locking interference near the upper thread region.

• Guided initial thread engagement.

• Resistance to unintended rotation.

• Conventional hexagon wrenching geometry.

• Compatibility with selected industrial fastening applications.

The locking geometry, installation direction and torque performance must follow the approved product drawing.

Metal-Stop vs. Spring-Stop Locknuts

Metal-stop and spring-stop locking mechanisms should not be treated as identical.

Top-Lock Distorted-Thread Metal-Stop Nuts

Use controlled deformation of the nut's internal thread or body to generate locking interference.

Spring-Stop Locknuts

May use formed metallic spring prongs or a separate metallic friction ring.

The spring feature elastically engages the mating bolt.

Engineering Difference

A distorted-thread locknut relies on the geometry of the deformed thread.

A spring-stop locknut relies on an elastic spring element.

The two designs may differ in:

• Prevailing torque.

• Installation effort.

• Reuse performance.

• Locking element durability.

• Manufacturing process.

• Functional testing requirements.

The actual construction must be verified before selecting the correct product family.

Metal-Stop vs. Nylon-Insert Locknuts

Nylon-insert locknuts use a polymer insert to create locking resistance.

All-metal distorted-thread locknuts use metallic interference.

Potential advantages of all-metal designs include:

• No nylon insert.

• Metallic locking construction.

• Potential suitability for selected elevated-temperature environments.

• Compatibility with certain vibration-exposed assemblies.

However, the operating temperature capability depends on the material, manufacturing process and service environment.

All-metal construction does not automatically establish unlimited temperature resistance or superior performance in every application.

A2-70 Stainless Steel Material

A2 is an austenitic stainless steel fastener material group commonly associated with 18-8-type stainless steel compositions.

The designation A2-70 identifies both the stainless steel material group and a mechanical property class.

Under ISO 3506-2, the property class of a regular or high stainless steel nut relates to its specified proof-load performance.

Engineering Considerations

A2-70 stainless steel may be relevant to:

• General industrial machinery.

• Indoor equipment.

• Outdoor equipment with suitable environmental exposure.

• Mechanical support brackets.

• Selected electrical and electronic equipment assemblies.

Suitability depends on the actual environment and mechanical requirements.

SUS316 Stainless Steel Material

SUS316 is a Japanese stainless steel material designation.

It is commonly associated with molybdenum-containing austenitic stainless steel used where improved corrosion resistance is required.

Potential applications include:

• Chemical processing equipment.

• Marine-adjacent machinery.

• Food processing equipment.

• Pharmaceutical equipment.

• Outdoor industrial equipment.

• Selected process equipment.

Important Material Distinction

SUS316 is a material grade designation.

A4-70 is a stainless steel fastener material-group and mechanical-property designation.

Although these designations may be related in commercial sourcing, they are not automatically equivalent.

For an OEM project, confirm:

• Chemical composition.

• Required mechanical property class.

• Proof-load requirements.

• Manufacturing condition.

• Applicable standard.

• Material traceability.

A2 Stainless Steel vs. SUS316

A2 stainless steel is commonly selected for general corrosion-resistant industrial fastening.

SUS316 may be considered for environments involving more demanding corrosion exposure.

Selection Factors

• Chloride concentration.

• Chemical exposure.

• Operating temperature.

• Surface condition.

• Cleaning chemicals.

• Mechanical loading.

• Cost.

• Availability.

Neither material is universally corrosion-proof.

The final grade should be selected according to the actual service environment.

Natural Stainless Steel Surface Finish

The original product specification identifies a natural stainless steel finish.

A natural finish generally means that the product retains the metallic appearance of the stainless steel surface without an additional decorative coating.

Potential finishing requirements may include:

• Deburring.

• Cleaning.

• Surface appearance control.

• Passivation.

• Electropolishing.

• Customer-specific surface treatment.

These additional processes must be specified separately.

RoHS Compliance and Surface Treatment

The product has been described as RoHS-compliant.

For stainless steel fasteners, compliance should be supported by the applicable material and process documentation.

RoHS compliance does not mean that a component must be zinc plated.

Natural stainless steel products can be evaluated against the applicable restricted-substance requirements.

If an OEM requires iridescent zinc plating or another coating, that request must be reviewed separately.

Important Coating Note

The original specification identifies a natural stainless steel finish.

Iridescent zinc plating is not established as the standard finish for this product.

Do not describe the featured product as zinc plated unless the actual manufacturing specification confirms it.

Corrosion Resistance of Stainless Steel Locknuts

Stainless steel offers corrosion resistance through its chromium-containing passive surface.

Actual performance depends on:

• Stainless steel grade.

• Surface condition.

• Chloride exposure.

• Chemical exposure.

• Temperature.

• Crevice geometry.

• Contact with dissimilar metals.

• Cleaning procedures.

A2 Applications

A2 stainless steel may be suitable for many general industrial environments.

SUS316 Applications

SUS316 may be considered for certain environments involving increased chloride or chemical exposure.

However, neither grade guarantees resistance to every corrosive condition.

Galvanic Corrosion Considerations

When stainless steel fasteners contact dissimilar metals, galvanic corrosion may occur under suitable environmental conditions.

Potential considerations include:

• Contact with aluminum.

• Contact with carbon steel.

• Moisture exposure.

• Electrical continuity.

• Relative exposed surface areas.

Insulating components or other approved design measures may be considered where appropriate.

Stainless Steel Thread Galling

Thread galling is an important engineering consideration for stainless steel nuts and bolts.

Galling is adhesive wear that may occur when contacting metallic surfaces slide under pressure.

It can cause:

• Increased installation torque.

• Thread damage.

• Seizing.

• Difficulty during removal.

• Inconsistent assembly performance.

Factors Increasing Galling Risk

• High contact pressure.

• Rapid installation.

• Incorrect thread alignment.

• Damaged threads.

• Inadequate lubrication.

• Unsuitable material combinations.

• Repeated installation.

Potential Engineering Controls

• Select compatible mating materials.

• Verify thread geometry.

• Avoid cross-threading.

• Control installation speed.

• Use approved lubrication where permitted.

• Validate tightening procedures.

• Inspect threads before reuse.

Lubrication changes friction and may affect clamp force.

For critical OEM joints, lubrication and tightening requirements should be validated together.

DIN 980:1987 Standard Reference

DIN 980:1987 is a historical German standard associated with all-metal prevailing-torque hexagon nuts.

It has been withdrawn.

The actual modern standard depends on the product geometry and thread configuration.

DIN 980 Type V

Type V refers to a single-piece all-metal locking construction using deformation of the metallic nut structure.

DIN 980 Type M

Type M refers to a construction using an additional metallic locking element.

The two types should not be treated as identical.

ISO 7719:2025

ISO 7719:2025 specifies prevailing-torque all-metal regular hexagon nuts in steel and stainless steel.

It covers metric coarse-pitch thread sizes from M5 to M39.

The standard provides a relevant modern reference for this product family.

However, conformity must be verified against the actual dimensions and mechanical properties.

ISO 7042

ISO 7042 is relevant to specified high prevailing-torque all-metal hexagon nut configurations.

It should not automatically be applied to regular-height nuts.

ISO 3506-2

ISO 3506-2 specifies mechanical properties for corrosion-resistant stainless steel nuts.

It provides relevant requirements for stainless steel grade and mechanical property designations.

ISO 2320

ISO 2320 provides functional requirements and test methods for prevailing-torque steel nuts within its defined scope.

For stainless steel nuts, the applicable test requirements must be verified against the governing product standard and customer specification.

Prevailing-Torque Performance

Prevailing torque is the resistance generated by the locking feature before significant clamp force develops.

Prevailing-On Torque

Resistance encountered as the nut advances along the mating bolt.

Prevailing-Off Torque

Resistance encountered during removal after the joint clamp force has been relieved.

Clamp Force

The compressive force developed in the joint through bolt tension.

Prevailing torque is not the same as clamp force.

The tightening procedure must account for the locking resistance and actual friction conditions.

Can Stainless Steel Metal-Stop Locknuts Be Reused?

Reuse depends on the actual locking mechanism and product specification.

For distorted-thread locknuts, repeated installation can change the locking interference and reduce prevailing torque.

Some commercial distorted-thread products are designated non-reusable.

Spring-stop products may have different reuse characteristics.

Therefore, the featured product must not be advertised as indefinitely reusable without functional test evidence.

For critical OEM applications, follow the approved replacement and maintenance requirements.

Metric Thread Sizes

The original product range lists:

• M5

• M6

• M8

• M10

• M12

• M14

• M16

• M20

Common metric coarse-thread references include:

• M5 × 0.8

• M6 × 1.0

• M8 × 1.25

• M10 × 1.5

• M12 × 1.75

• M14 × 2.0

• M16 × 2.0

• M20 × 2.5

These are engineering references.

The actual pitch and thread tolerance must be confirmed for each ordered product.

Metric Fine-Pitch Requirements

Some OEM assemblies require metric fine-pitch threads.

Potential engineering considerations include:

• Thread geometry.

• Mating bolt compatibility.

• Nut height.

• Locking interference.

• Mechanical properties.

• Functional testing.

• Manufacturing feasibility.

Fine-pitch availability must be confirmed separately.

Metric vs. UNC and UNF Threads

American buyers may search for similar stainless steel locking nuts using UNC or UNF terminology.

However, the original product range is metric.

Metric and Unified inch-series threads are not directly interchangeable.

For example:

• M6 × 1.0 is not interchangeable with 1/4"-20 UNC.

• M8 × 1.25 is not interchangeable with 5/16"-18 UNC.

• M10 × 1.5 is not interchangeable with 3/8"-16 UNC.

Inch-series requirements must be evaluated as separate product specifications.

Industrial Applications and Engineering Solutions

1. Chemical Processing Equipment

Chemical processing equipment may require corrosion-resistant mechanical fasteners.

Potential applications include:

• External equipment brackets.

• Mechanical support frames.

• Pump accessories.

• Serviceable equipment components.

Engineering Challenge

Chemical exposure and equipment vibration may affect fastener performance.

Potential Solution

A suitable stainless steel locking nut may be evaluated according to the chemical environment, mechanical loading and approved material specification.

2. Food Processing Machinery

Food processing equipment may require corrosion-resistant fastening hardware for selected mechanical assemblies.

Potential applications include:

• Equipment brackets.

• External support structures.

• Conveyor accessories.

• Serviceable machinery components.

Engineering Challenge

Cleaning moisture and repeated equipment operation may affect fastener selection.

Potential Solution

A suitable stainless steel locking nut may be considered where the material and surface condition satisfy the application requirements.

Food-contact suitability and sanitation approvals must be verified separately.

3. Pharmaceutical Equipment

Pharmaceutical equipment manufacturers may require carefully specified stainless steel components.

Engineering Challenge

Material cleanliness, chemical compatibility and maintenance requirements may affect fastener selection.

Potential Solution

A stainless steel metal-stop nut may be evaluated for approved mechanical connections.

Cleanroom and contamination requirements must be addressed separately.

4. Marine and Coastal Equipment

Marine-adjacent equipment may require corrosion-resistant fastening hardware.

Engineering Challenge

Salt exposure and humidity may accelerate corrosion.

Potential Solution

SUS316 stainless steel may be considered for selected environments, subject to the actual exposure conditions and engineering requirements.

5. Industrial Pumps and Compressors

Pumps and compressors may create mechanical vibration during operation.

Engineering Challenge

Bolted joints require appropriate preload and locking resistance.

Potential Solution

A stainless steel prevailing-torque nut may be evaluated for suitable mechanical support connections.

6. HVAC and Thermal Management Equipment

HVAC systems contain fans, pumps and mechanical equipment supports.

Engineering Challenge

Vibration and condensation may affect threaded connections.

Potential Solution

A corrosion-resistant stainless steel locking nut may be considered where the joint design permits.

7. Industrial Machinery and Automation

Industrial machinery may require corrosion-resistant mechanical fasteners.

Potential applications include:

• Equipment frames.

• Machine brackets.

• Mechanical guards.

• Serviceable support assemblies.

Engineering Challenge

Repeated operation may affect joint retention.

Potential Solution

A properly specified all-metal locking nut may be evaluated as part of the complete bolted joint.

8. Semiconductor Equipment

Semiconductor manufacturing equipment may require carefully specified stainless steel hardware.

Engineering Challenge

Surface cleanliness, corrosion resistance and particle generation may be important.

Potential Solution

A stainless steel metal-stop nut may be evaluated for selected external mechanical assemblies.

Cleanroom suitability and particle performance require separate validation.

9. Electrical Enclosures

Electrical equipment manufacturers may require corrosion-resistant mechanical fastening components.

Engineering Challenge

Humidity, thermal cycling and equipment vibration may affect fastening performance.

Potential Solution

A stainless steel locking nut may be considered for suitable mechanical mounting applications.

Electrical grounding and insulation requirements must be evaluated separately.

10. AI Data Center Cooling Equipment

AI data center infrastructure includes mechanical cooling equipment, pumps and support frames.

Engineering Challenge

Continuous operation may produce vibration in selected mechanical systems.

Potential Solution

A suitable stainless steel locking nut may be evaluated for non-critical mechanical support connections.

11. Renewable Energy Equipment

Renewable energy equipment may operate in outdoor environments.

Engineering Challenge

Moisture exposure and vibration may affect joint performance.

Potential Solution

A properly specified stainless steel locking nut may be considered according to the corrosion and mechanical requirements.

12. Automotive Equipment

Automotive equipment manufacturers may require all-metal locking fasteners for selected mechanical connections.

Engineering Challenge

Vibration and repeated loading may affect joint retention.

Potential Solution

A qualified stainless steel metal-stop nut may be evaluated where the mechanical properties and customer specifications permit.

Safety-critical connections require dedicated validation.

13. Commercial Kitchen Equipment

Commercial kitchen equipment may require corrosion-resistant mechanical hardware.

Engineering Challenge

Frequent cleaning and moisture exposure may affect fastening components.

Potential Solution

A suitable stainless steel locking nut may be evaluated for non-food-contact mechanical assemblies.

14. Outdoor Industrial Equipment

Outdoor machinery and enclosures may experience changing environmental conditions.

Engineering Challenge

Moisture and temperature cycling may affect fastener selection.

Potential Solution

A suitable stainless steel grade may provide corrosion resistance when correctly specified.

Installation and Assembly Engineering

Correct installation is essential for stainless steel prevailing-torque nuts.

Step 1: Verify the Mating Bolt

Confirm thread diameter, pitch, material and mechanical properties.

Step 2: Inspect the Locking Feature

Check the internal thread and locking region for damage.

Step 3: Confirm Installation Direction

Follow the approved installation direction for the actual locking design.

Step 4: Start the Threads Correctly

Avoid cross-threading.

Step 5: Engage the Locking Section

Advance the nut according to the approved assembly procedure.

Step 6: Apply the Required Tightening Method

Use the specified torque or tensioning procedure.

Step 7: Verify the Joint

Confirm seating, thread engagement and any required clamp-force or functional criteria.

Important Installation Considerations

• Thread alignment.

• Stainless steel galling.

• Mating bolt compatibility.

• Prevailing torque.

• Installation speed.

• Approved lubrication.

• Thread engagement.

• Reuse restrictions.

Production Management and Assembly Efficiency

For production managers, stainless steel locking nuts affect assembly consistency and manufacturing cost.

Important factors include:

• Material selection.

• Nut feeding and orientation.

• Thread starting.

• Installation torque.

• Galling prevention.

• Tool capability.

• Assembly cycle time.

• Functional inspection.

• Rework.

• Maintenance access.

• Lot-to-lot consistency.

• Repeat-order supply stability.

The actual production process should be validated using the selected nut and mating bolt combination.

Common Engineering Problems and Troubleshooting

Problem 1: Excessive Installation Torque

Possible causes include incorrect locking interference, galling or incompatible mating threads.

Problem 2: Insufficient Prevailing Torque

Possible causes include locking feature wear, manufacturing variation or incorrect geometry.

Problem 3: Stainless Steel Thread Galling

Possible causes include high contact pressure, unsuitable material combinations or rapid installation.

Problem 4: Thread Damage

Possible causes include cross-threading or incompatible mechanical properties.

Problem 5: Inconsistent Clamp Force

Possible causes include friction variation or unsuitable tightening procedures.

Problem 6: Corrosion

Possible causes include unsuitable stainless steel grade, chloride exposure or surface contamination.

Problem 7: Reduced Locking Performance After Removal

Possible causes include thread wear or changes in the locking feature.

Problem 8: Joint Loosening

Possible causes include inadequate preload, joint settlement or insufficient locking performance.

Corrective actions should follow the actual product specification and joint engineering requirements.

Quality Inspection and OEM Validation

Quality requirements should be defined by the approved engineering drawing.

Dimensional Inspection

Potential characteristics include:

• Thread diameter.

• Thread pitch.

• Nut height.

• Width across flats.

• Locking feature geometry.

• Critical dimensional tolerances.

Material Verification

Confirm the specified stainless steel grade and applicable mechanical requirements.

Mechanical Property Verification

Verify the required nut mechanical property class according to the applicable standard.

Prevailing-Torque Testing

Potential customer requirements include:

• Prevailing-on torque.

• Prevailing-off torque.

• Functional locking performance.

• Repeated installation testing where specified.

Surface Inspection

Potential requirements include:

• Natural finish appearance.

• Surface cleanliness.

• Burr removal.

• Passivation requirements, where specified.

• Corrosion condition.

Functional Assembly Validation

Depending on the application, testing may include:

• Mating bolt compatibility.

• Installation torque.

• Locking performance.

• Galling resistance.

• Vibration resistance.

• Temperature exposure.

• Corrosion exposure.

• Joint retention.

These are potential customer-defined requirements, not claims that every test is routinely performed on every production lot.

OEM Quality Documentation

Depending on customer requirements, documentation may include:

• Approved engineering drawings.

• Material specifications.

• Dimensional inspection reports.

• Mechanical property reports.

• Prevailing-torque test reports.

• Surface treatment specifications.

• Corrosion test reports.

• First article inspection.

• Production traceability.

• Process control records.

• PPAP documentation where applicable.

• Engineering change control.

Specific certifications and customer approvals must be supported by the appropriate records.

Custom Stainless Steel Hex Metal-Stop Locknuts to Engineering Drawings

JUXIN FASTENERS supports drawing-based OEM inquiries for stainless steel Hex Metal-Stop Locknuts and related all-metal prevailing-torque fasteners.

Custom requirements may include:

• A2 stainless steel material group.

• SUS316 stainless steel.

• Required mechanical property class.

• Metric thread diameter.

• Thread pitch.

• Nut height.

• Width across flats.

• Locking feature geometry.

• Prevailing-torque limits.

• Natural finish.

• Passivation requirements.

• Corrosion resistance.

• Operating temperature.

• Inspection criteria.

• Packaging.

• Production quantity.

Manufacturing feasibility depends on the approved engineering requirements.

Frequently Asked Engineering and Procurement Questions

What are Stainless Steel Hex Metal-Stop Locknuts?

They are stainless steel all-metal locking nuts. The featured top-lock version uses controlled thread deformation to generate prevailing torque.

What is the common American technical name?

Stainless Steel Top-Lock Distorted-Thread Locknuts is a recognized technical designation for this locking mechanism.

Are Metal-Stop and Spring-Stop Locknuts the same?

No. The locking mechanisms may differ. The actual product structure must be verified.

What is A2-70 stainless steel?

A2-70 identifies an austenitic stainless steel fastener material group and mechanical property class.

What is SUS316 stainless steel?

SUS316 is a Japanese stainless steel material designation commonly associated with molybdenum-containing austenitic stainless steel.

Is SUS316 automatically equivalent to A4-70?

No. A4-70 includes a mechanical property designation that must be verified separately.

What is the standard surface finish?

The original product specification identifies a natural stainless steel finish.

Does natural stainless steel require zinc plating?

No. Stainless steel provides corrosion resistance through its material composition and passive surface.

Can stainless steel locking nuts experience galling?

Yes. Galling can occur under certain installation conditions.

Are these nuts suitable for marine environments?

Suitability depends on the selected stainless steel grade and actual exposure conditions.

Can these nuts be reused?

Reuse depends on the locking design, remaining prevailing torque and approved maintenance requirements.

What is DIN 980?

DIN 980:1987 is a historical German standard associated with all-metal prevailing-torque hexagon nuts.

Does ISO 7719 cover stainless steel nuts?

Yes. ISO 7719:2025 includes specified regular all-metal prevailing-torque hexagon nuts in steel and stainless steel.

What sizes are listed?

M5, M6, M8, M10, M12, M14, M16 and M20.

Can metric nuts be installed on UNC bolts?

No. Metric and UNC threads are not directly interchangeable.

Can JUXIN FASTENERS evaluate custom stainless steel locknut drawings?

Yes. Customer-specific inquiries can be reviewed according to the supplied drawings and production requirements.

Request a Custom Stainless Steel Hex Metal-Stop Locknut RFQ

JUXIN FASTENERS supports OEM sourcing and engineering inquiries for stainless steel Hex Metal-Stop Locknuts, top-lock distorted-thread hex nuts and specialized all-metal prevailing-torque fasteners.

For a new OEM program or an existing production component, please provide:

• 2D engineering drawing or 3D CAD file.

• Required product standard and edition.

• Stainless steel material designation.

• Required mechanical property class.

• Metric thread diameter and pitch.

• Mating bolt specification.

• Nut height and width across flats.

• Locking feature geometry.

• Prevailing-on torque requirements.

• Prevailing-off torque requirements.

• Reuse requirements, if applicable.

• Natural finish or additional surface treatment specification.

• Corrosion resistance requirements.

• Galling prevention or lubrication requirements.

• Operating environment.

• Quality and inspection requirements.

• Initial order quantity.

• Estimated annual production volume.

• Target delivery schedule.

Our team can review the technical requirements and discuss manufacturing feasibility, engineering clarification and quotation.

JUXIN FASTENERS

Website: https://www.juxinfasteners.com/

Email: info@juxinfasteners.com

Submit Your Engineering Drawings for a Custom Stainless Steel Hex Metal-Stop Locknut RFQ.

Packaging Standard

At Juxin Fasteners, we apply standardized export packaging to ensure product protection, traceability, and compliance with international logistics requirements.

1. Standard Export Packaging

Unless otherwise specified, all products will be packed according to our factory standard export packaging, which includes:

Moisture-resistant inner protection

Poly bag or small box packing as required

Reinforced export cartons

Clear labeling with part number, specification, batch number, and quantity

Palletizing for sea or air shipment when necessary

Our standard packaging is designed to ensure safe transportation, efficient warehousing, and long-distance international shipping.

2. Customized Packaging Options

We also provide customized packaging solutions according to customer requirements, including but not limited to:

Private labeling

Customized barcodes

Specific carton dimensions

Retail packaging

Special pallet configuration

Customer-specific marking and identification

So that you know, customized packaging may involve additional costs and extended lead time depending on the complexity of the requirements.

3. Compliance & Quality Assurance

All packaging processes are controlled under our ISO 9001 quality management system to ensure consistency, traceability, and product integrity throughout the supply chain.