Automotive Threaded Fasteners: Joint Design, Locking & OEM Sourcing Guide

Automotive threaded fasteners are not selected simply by diameter, thread and strength grade.

A reliable automotive threaded joint depends on the interaction between:

Fastener Geometry + Material + Mechanical Properties + Thread Engagement + Preload + Friction + Locking Strategy 

+ Surface Treatment + Parent Material + Installation Process + Operating Environment

This system-level approach becomes increasingly important as vehicle manufacturers combine high-strength steel, aluminum, 

plastics, composites, electrical equipment and lightweight sheet-metal structures in conventional and electric vehicle platforms.

JUXIN FASTENERS supplies selected automotive and industrial threaded fastening components, including:

• Bolts

• Machine screws

• Special screws

• Nuts

• Flange nuts

• Nylon insert lock nuts

• All-metal prevailing torque nuts

• Rivet nuts

• Weld nuts

• Threaded inserts

• Threaded inserts for plastics

• Self-clinching threaded fasteners

• Custom drawing-based fasteners

For OEM, Tier-1 and Tier-2 sourcing projects, the correct question is not simply:

"Which automotive fastener should we buy?"

It is:

"What threaded-joint architecture will generate and maintain the required clamp load throughout manufacturing and service?"

What Are Automotive Threaded Fasteners?

Automotive threaded fasteners are detachable mechanical fastening components that use mating threads to assemble vehicle components and subsystems.

Common product families include:

• Bolts and nuts

• Machine screws

• Thread-forming screws

• Self-tapping screws

• Flange bolts and flange nuts

• Prevailing-torque lock nuts

• Rivet nuts

• Weld nuts

• Threaded inserts

• Self-clinching nuts and studs

• Custom threaded components

Depending on the product, threads may follow applicable international systems such as:

• ISO metric threads

• Unified inch threads

• Fine-pitch threads

• Coarse-pitch threads

• Application-specific thread forms

But selecting the thread standard is only the beginning.

The Primary Function of a Threaded Joint Is Usually Clamp Load

A common misunderstanding is that the thread itself carries the entire external service load.

In many properly designed bolted joints, tightening stretches the bolt and compresses the clamped components.

This creates preload.

The resulting clamp force helps keep the joint members together during service.

Therefore, for many automotive bolted joints:

The objective is not simply to tighten the bolt. The objective is to create an appropriate and repeatable joint preload.

This distinction affects fastener selection, coating, lubrication, tightening strategy and supplier qualification.

Torque ≠ Preload

Tightening torque is commonly used as an installation control method, but torque is not the same as bolt preload.

A simplified relationship can be represented conceptually as:

T = K × F × d

where:

• T = tightening torque

• K = torque/friction factor

• F = target preload

• d = nominal fastener diameter

This simplified relationship illustrates an important principle:

Torque ≠ Preload.

Much of the applied torque is influenced by friction in the threads and under the bearing surface.

If friction changes, the resulting preload can change even when the torque wrench setting remains identical.

Why Fastener Coating Matters to Automotive Joint Design

Surface treatment is not only a corrosion decision.

It can influence:

• Thread friction

• Bearing-surface friction

• Torque-tension behavior

• Assembly repeatability

• Thread fit

• Corrosion performance

• Appearance

Automotive fastener finishes may include, depending on the project:

• Zinc plating

• Zinc-nickel plating

• Zinc-flake coating systems

• Phosphate-based systems

• Application-specific topcoats or lubricants

The correct system depends on the drawing and OEM requirements.

A critical engineering principle is:

Same Torque + Different Friction ≠ Same Preload.

Therefore, changing an approved coating can become an engineering change rather than a cosmetic purchasing substitution.

Higher Fastener Strength ≠ Automatically Better Joint

Another common sourcing mistake is assuming that a higher property class automatically improves the assembly.

It does not.

The joint can be limited by:

• Mating internal thread

• Parent material

• Thread engagement

• Sheet thickness

• Insert retention

• Weld quality

• Bearing surface

• Joint stiffness

• Installation method

For example, installing a stronger screw into a weak aluminum or plastic mating thread does not automatically increase joint capacity.

Stronger Mating Screw ≠ Stronger Mating Thread.

Fastener strength must be selected together with the complete joint.

Coarse vs Fine Threads in Automotive Assemblies

Both coarse and fine threads can be appropriate depending on the application.

Coarse Threads

Potential advantages can include:

• Greater tolerance to contamination or handling damage

• Faster assembly for a given engagement length

• Practical use in many production environments

• Suitability for many general bolted joints

Fine Threads

Potential advantages can include:

• More threads per unit length

• Different tensile stress area for the same nominal diameter

• Different adjustment characteristics

• Potential benefits where geometry or joint design requires fine pitch

But:

Fine Thread ≠ Automatically Better Anti-Loosening Performance.

Thread pitch is only one part of joint behavior.

Vibration resistance depends strongly on preload, joint stiffness, transverse movement, friction, locking strategy and assembly control.

Why Automotive Threaded Joints Loosen

Fastener loosening is often described too simply as:

"The vehicle vibrates, so the nut comes loose."

Real joint behavior is more complex.

Loss of clamp load can result from:

• Insufficient initial preload

• Embedment

• Surface settling

• Joint relaxation

• Transverse movement

• Thermal cycling

• Soft joint materials

• Creep

• Improper tightening

• Friction variation

• Repeated service loading

• Incorrect locking feature

This means the correct solution is not automatically to add a lock nut or washer.

The root cause should be identified first.

Locking Feature ≠ Correct Tightening

A locking feature can resist rotational movement.

It does not compensate for a poorly designed or incorrectly tightened joint.

Therefore:

Locking Feature ≠ Correct Preload.

An automotive joint should first establish the required clamp force and then determine whether an additional anti-loosening mechanism is necessary.

Nylon Insert Lock Nuts

Nylon insert lock nuts create prevailing torque through interaction between the mating thread and polymer insert.

Potential advantages include:

• Prevailing torque

• Compact integrated locking feature

• Wide industrial availability

• Practical assembly

They can be considered for selected automotive and industrial applications where:

• Temperature is compatible with the insert material

• Chemical exposure is acceptable

• Required prevailing-torque behavior is defined

• Reuse requirements are understood

However:

Nylon Insert Lock Nut ≠ Universal High-Temperature Locking Solution.

Temperature, chemicals and repeated assembly can affect polymer behavior.

All-Metal Prevailing Torque Nuts

All-metal lock nuts generate prevailing torque through controlled metallic deformation or locking geometry.

They can be considered where:

• Higher temperature capability is required

• Polymer inserts are unsuitable

• A metallic locking system is specified

But:

Prevailing Torque ≠ Preload.

The torque required to overcome the locking feature is separate from the torque used to generate clamp load.

This distinction is important when defining installation torque.

Serrated Flange Nuts

Serrated flange nuts combine a flange bearing surface with serrations designed to resist rotation against the mating surface.

They can be effective in selected applications, but engineers should consider:

• Mating surface material

• Surface coating

• Surface damage

• Electrical requirements

• Reusability

• Required clamp load

Serrations can mark or penetrate the mating surface.

Therefore they are not automatically suitable for every coated, painted or appearance-sensitive assembly.

What About Spring Washers?

Spring washers are widely recognized fastening components, but they should not automatically be described as a universal automotive anti-loosening solution.

The effectiveness of any washer-based locking strategy depends on:

• Joint design

• Preload

• Washer type

• Mating surfaces

• Service loading

• Vibration mode

Therefore:

Washer ≠ Automatic Anti-Loosening Device.

For critical joints, the locking strategy should be validated against the actual service condition.

Wedge-Locking Systems

Wedge-locking washer systems use engineered cam geometry to resist self-loosening under selected dynamic conditions.

They can be useful where the application justifies the additional component and cost.

However, their selection still requires consideration of:

• Joint geometry

• Bearing surface

• Bolt size

• Installation

• Reuse

• Space

• Cost

No locking technology replaces correct joint design.

Thread-Locking Adhesives

Thread-locking compounds can provide another anti-loosening strategy.

Selection may depend on:

• Thread size

• Material

• Surface treatment

• Cure condition

• Temperature

• Chemical environment

• Required disassembly

• Production process

Compatibility with coating and assembly-line conditions should be evaluated.

Automotive Bolts

Automotive bolts cover a wide range of functions, from general brackets to highly controlled structural joints.

Relevant selection variables include:

• Diameter

• Thread pitch

• Length

• Head geometry

• Material

• Property class

• Heat treatment

• Surface treatment

• Friction

• Mating thread

• Installation method

• Load

• Fatigue

• Environment

For safety-critical applications, the applicable OEM drawing and validation requirements govern the fastener.

A generic "high-strength automotive bolt" should never be treated as automatic approval for a critical vehicle location.

Automotive Screws

Automotive screws can be used in:

• Interior assemblies

• Electrical equipment

• Electronic housings

• Brackets

• Plastic components

• Sheet-metal assemblies

Potential product families include:

• Machine screws

• Thread-forming screws

• Self-tapping screws

• Flange screws

• Special drawing-based screws

The correct screw depends heavily on the mating material.

A screw optimized for steel sheet may not be suitable for aluminum or thermoplastic.

Thread-Forming Screws in Automotive Assemblies

Thread-forming screws can reduce the need for a separately manufactured internal thread in selected applications.

However, engineering must consider:

• Parent material

• Material thickness

• Hole geometry

• Pilot-hole size

• Screw geometry

• Installation torque

• Strip-out torque

• Repeated service requirements

More installation torque does not mean a better joint.

The correct process creates a controlled mating thread without damaging the parent component.

Automotive Nuts

Automotive nut families can include:

• Hex nuts

• Flange nuts

• Nylon insert lock nuts

• All-metal lock nuts

• Weld nuts

• Captive nuts

• Custom nuts

Selection should consider:

• Mating bolt

• Bolt property class

• Proof-load requirement

• Thread

• Surface treatment

• Locking requirement

• Installation process

Material Grade ≠ Finished Component Compliance.

The finished nut must satisfy the required component and joint performance.

Weld Nuts for Automotive Sheet Metal

Weld nuts create a threaded attachment point by welding the nut to sheet metal.

Potential applications include selected:

• Body structures

• Brackets

• Frames

• Enclosures

• Equipment mounts

But weld-nut performance depends on more than nut strength.

Important variables include:

• Parent sheet material

• Sheet thickness

• Nut material

• Projection geometry

• Welding current

• Welding time

• Electrode force

• Tooling

• Alignment

• Surface condition

Therefore:

Strong Nut ≠ Strong Welded Joint.

And:

More Welding Energy ≠ Better Weld.

The fastener and welding process must be developed as a system.

Rivet Nuts for One-Sided Automotive Assembly

Rivet nuts provide reusable internal threads in thin sheet or other suitable parent materials where rear-side access may be limited.

They can be useful for selected:

• Body panels

• Brackets

• Electrical enclosures

• Equipment housings

• EV-related assemblies

• Serviceable components

Selection should consider:

• Parent material

• Sheet thickness

• Hole size

• Hole geometry

• Grip range

• Body style

• Flange style

• Setting tool

• Pull-out resistance

• Spin-out resistance

Remember:

Pull-Out ≠ Spin-Out.

And:

Spin-Out ≠ Screw Self-Loosening.

These are different failure modes.

More Rivet Nut Setting Force ≠ Better Installation

Over-setting a rivet nut can damage:

• Fastener

• Parent sheet

• Threads

• Coating

• Installed geometry

Under-setting can also reduce retention.

The correct setting process depends on the rivet nut, grip range, parent material and installation tool.

Self-Clinching Fasteners for Automotive and EV Equipment

Self-clinching nuts, studs and standoffs create permanent captive threaded features in suitable sheet materials.

They rely on controlled material flow during installation.

Important variables include:

• Sheet material

• Sheet hardness

• Sheet thickness

• Hole size

• Edge distance

• Fastener geometry

• Tooling

• Press installation

Performance can be evaluated through characteristics such as:

• Push-out resistance

• Torque-out resistance

But:

More Press Force ≠ Better Installation.

Incorrect installation can damage the sheet or reduce retention.

Threaded Inserts for Aluminum Components

Aluminum structures can benefit from threaded inserts where the base material alone does not provide the required thread performance or serviceability.

Applications may include selected:

• Housings

• Electronic equipment

• Motor-related equipment

• Lightweight brackets

• EV components

Engineering should consider:

• Aluminum alloy

• Wall thickness

• Insert material

• Insert geometry

• Thread engagement

• Installation method

• Galvanic compatibility

• Required service cycles

A stronger insert cannot compensate for inadequate parent material.

Strong Insert ≠ Strong Parent Material.

Threaded Inserts for Plastic Automotive Components

Plastic components introduce different engineering behavior from metals.

Threaded inserts may be used in selected:

• Electronic housings

• Interior equipment

• Sensors

• Control modules

• Plastic brackets

• Electrical components

Selection should consider:

• Polymer type

• Polymer grade

• Reinforcement

• Boss geometry

• Hole geometry

• Insert geometry

• Installation method

• Temperature

• Moisture

• Creep

• Stress relaxation

• Chemical exposure

The insert is only one part of the joint.

Strong Insert ≠ Strong Plastic Joint.

Plastic Creep and Stress Relaxation Matter

Polymers can change under sustained load.

This can reduce clamp force over time.

Therefore, a metal fastener that is perfectly adequate in a steel joint may behave differently when clamping a plastic component.

Engineering may need to consider:

• Clamp load

• Bearing area

• Polymer creep

• Thermal cycling

• Moisture absorption

• Service temperature

This is particularly relevant in automotive electronics and EV equipment.

Automotive Sheet Metal: Which Threaded Fastening Technology?

A useful selection framework is:

This is a screening framework.

Final selection depends on material, load, access, process and validation requirements.

Automotive Threaded Fasteners for EV Battery-Related Equipment

EV platforms introduce new fastening environments but do not eliminate conventional joint-engineering principles.

Potential JUXIN FASTENERS products for selected EV equipment can include:

• Bolts

• Screws

• Lock nuts

• Rivet nuts

• Weld nuts

• Threaded inserts

• Self-clinching fasteners

• Plastic fasteners

• Custom drawing-based components

Potential applications include selected:

• Battery-related enclosures

• Power-electronic equipment

• Cooling equipment

• Electrical housings

• Brackets

• Cable-management equipment

Engineering should consider:

• Mixed materials

• Corrosion

• Galvanic compatibility

• Thermal cycling

• Electrical isolation

• Grounding strategy

• Sealing interfaces

• Serviceability

A fastener alone does not establish battery-system compliance.

Electrical Conductivity Requires Separate Engineering

Metal fasteners are sometimes part of an electrical connection or grounding path.

But:

Metal Fastener ≠ Qualified Electrical Connection.

And:

Conductive Coating ≠ Qualified Electrical Connection.

Electrical performance can depend on:

• Contact surface

• Coating

• Contact pressure

• Oxidation

• Current

• Thermal cycling

• Mating material

• Joint design

Mechanical and electrical functions should be defined separately where necessary.

Corrosion Protection for Automotive Threaded Fasteners

Corrosion requirements vary by vehicle location.

Possible surface-treatment systems include:

• Zinc plating

• Zinc-nickel plating

• Zinc-flake systems

• Other customer-specified coatings

Selection should consider:

• Exposure

• Base material

• Strength

• Friction

• Thread fit

• Mating material

• Installation

• OEM specification

Remember:

Salt Spray Hours ≠ Field Service Life.

And:

Coating Name ≠ Complete Coating Specification.

Galvanic Corrosion in Mixed-Material Vehicle Structures

Modern vehicles increasingly combine:

• Carbon steel

• Coated steel

• Stainless steel

• Aluminum

• Copper alloys

• Composite materials

When dissimilar metals are electrically connected in the presence of an electrolyte, galvanic corrosion can become relevant.

The joint should therefore be evaluated as a material system.

Corrosion-Resistant Fastener ≠ Corrosion-Resistant Assembly.

Stainless Steel Automotive Fasteners

Stainless steel can be appropriate for selected corrosion-sensitive automotive components.

But:

Stainless Steel ≠ Corrosion-Proof.

And:

Stainless Steel ≠ Anti-Loosening Feature.

Engineering should consider:

• Stainless grade

• Environment

• Chlorides

• Galling

• Friction

• Preload

• Mating material

• Galvanic interaction

Stainless steel should be selected because its properties fit the joint, not simply because "stainless sounds better."

Aluminum Automotive Fasteners

Aluminum fasteners can support lightweighting in selected applications.

However:

Aluminum Fastener ≠ Steel Fastener at Lower Weight.

Selection should consider:

• Alloy

• Mechanical properties

• Thread strength

• Mating material

• Engagement

• Preload

• Galvanic corrosion

• Surface treatment

• Thermal expansion

• Repeated service

Weight reduction must be evaluated together with joint performance.

Vibration Resistance Starts with Joint Design

When an automotive fastener loosens, the first response should not automatically be:

"Use a stronger lock nut."

A better investigation asks:

• Was sufficient preload achieved?

• Did the joint settle?

• Is transverse movement occurring?

• Are clamped materials creeping?

• Did friction vary?

• Is the tightening method appropriate?

• Is the locking system suitable?

• Is the joint stiff enough?

• Is thermal cycling affecting clamp load?

This cause-and-effect approach produces better engineering decisions.

Common Automotive Threaded Joint Failure Modes

Loss of Preload

Possible causes:

• Incorrect tightening

• Friction variation

• Embedment

• Creep

• Thermal effects

Thread Stripping

Possible causes:

• Insufficient engagement

• Weak mating material

• Excessive installation torque

• Incorrect thread geometry

Bolt Fracture

Possible causes:

• Overload

• Excessive preload

• Fatigue

• Material or manufacturing issue

• Hydrogen embrittlement in susceptible components

Self-Loosening

Possible causes:

• Transverse joint movement

• Insufficient clamp load

• Inappropriate locking strategy

Corrosion Failure

Possible causes:

• Incorrect coating

• Galvanic interaction

• Environmental exposure

• Coating damage

Insert Pull-Out or Spin-Out

Possible causes:

• Incorrect parent material

• Poor hole geometry

• Incorrect installation

• Insufficient engagement or retention

The failure mode should be identified before changing the fastener.

Automotive Fastener Selection Decision Framework

A practical engineering sequence is:

Joint Function → Parent Material → Load → Access → Thread Strategy → Fastener Type 

→ Material / Strength → Preload → Locking Strategy → Coating / Friction → Installation → Validation

This is more reliable than selecting a bolt from a catalog first and attempting to adapt the joint around it.

What Should Be Defined on an Automotive Fastener Drawing?

Depending on the application, a drawing or controlled specification may include:

• Part number

• Revision

• Geometry

• Thread

• Material

• Mechanical property requirements

• Heat treatment

• Surface treatment

• Coating thickness

• Friction requirement

• Locking feature

• Critical dimensions

• Functional requirements

• Inspection requirements

• Applicable ISO, DIN, EN, SAE, ASTM or OEM requirements

For custom components, the drawing should distinguish critical functional characteristics from general dimensions.

Supplier Qualification: More Than Checking a Sample

Procurement and supplier-development teams should evaluate whether a supplier can control the complete manufacturing route.

Depending on the component, this may include:

• Raw material

• Forming

• Machining

• Thread production

• Heat treatment

• Surface treatment

• Locking feature

• Inspection

• Functional testing

• Packaging

• Traceability requirements

A sample that fits the mating component does not by itself prove production capability.

Second-Source Automotive Fastener Qualification

Automotive supply chains frequently develop alternate sources to reduce supply risk.

But:

Same Dimensions ≠ Functional Equivalence.

A second-source fastener may need comparison of:

• Drawing revision

• Material

• Mechanical properties

• Heat treatment

• Thread

• Geometry

• Surface treatment

• Friction

• Locking feature

• Installation behavior

• Functional testing

• Assembly validation

For rivet nuts, installed retention matters.

For weld nuts, welding behavior matters.

For lock nuts, prevailing torque behavior matters.

For torque-controlled bolts, friction matters.

The qualification plan should follow the actual function of the part.

Procurement Should Compare Total Installed Cost

Unit price is only one part of automotive fastener cost.

A useful sourcing model is:

Total Installed Cost = Part Price + Installation + Tooling + Inspection + Rework + Scrap + Downtime + Logistics + Supply Risk

A lower-priced fastener may create higher total cost if it requires:

• Slower installation

• Additional inspection

• More rework

• Frequent tool adjustment

• Higher scrap

• Production interruptions

Likewise, an unnecessarily complex fastener can increase cost without creating functional value.

OEM Fastener RFQ Checklist

For an efficient engineering and commercial review, provide:

• 2D drawing

• 3D model where relevant

• Part number

• Revision

• Application

• Fastener type

• Thread

• Material

• Mechanical property requirement

• Mating component

• Parent material

• Sheet thickness where applicable

• Hole size where applicable

• Grip range for rivet nuts

• Locking requirement

• Surface treatment

• Friction requirement where applicable

• Installation method

• Load requirement

• Operating environment

• Annual volume

• Sample quantity

• Validation requirement

• Applicable ISO, DIN, EN, SAE, ASTM or OEM specification

The more accurately the application is defined, the more meaningful the supplier quotation becomes.

From Automotive Fastener RFQ to Production Approval

A typical development path may be:

Application Review → Drawing Review → Fastener Selection / DFM → Material & Coating Review → Quotation → Sample

 → Dimensional Inspection → Functional Testing → Assembly Trial → Customer Approval → Production

The exact validation level should follow the component risk.

A trim screw does not require the same qualification strategy as a highly loaded structural joint.

Related JUXIN FASTENERS Engineering Resources

This page should operate as the main Automotive Threaded Fastener / Threaded Joint Engineering resource.

Recommended internal links include:

• Automotive Sheet Metal Fastening → rivet nuts, weld nuts, blind rivets and self-clinching technology selection

• Fastener Surface Treatment & Coating Selection → corrosion, friction and coating engineering

• Zinc-Nickel Coated Fasteners → Zn-Ni specification and sourcing

• Zinc vs Zinc-Nickel Plating → coating comparison and cost-performance decisions

• Lock Nuts → prevailing torque and anti-loosening engineering

• Rivet Nuts → one-sided threaded fastening for sheet metal

• Weld Nuts → welded threaded attachment engineering

• Threaded Inserts for Plastic → polymer joint design

• Self-Clinching Fasteners → captive threads in suitable sheet materials

• High-Strength Fasteners → property class, preload and material compatibility

• Fastener Failure Modes → loosening, fatigue, corrosion and joint failure analysis

• Custom Fastener Manufacturing → drawing-based manufacturing and DFM

Use the existing indexed JUXIN FASTENERS URL when implementing these internal links.

Frequently Asked Questions

What are the most common automotive threaded fasteners?

Common families include bolts, screws, nuts, flange nuts, prevailing-torque lock nuts, weld nuts, rivet nuts, threaded inserts and self-clinching threaded fasteners.

 The correct technology depends on parent material, access, load and assembly process.

What causes automotive bolts to loosen?

Loss of preload, transverse movement, joint settling, creep, thermal cycling, friction variation and incorrect tightening can all contribute. 

Vibration alone does not fully explain every loosening problem.

Is a lock nut enough to prevent vibration loosening?

Not necessarily. A locking feature does not replace correct joint design and preload. 

The root cause of clamp-load loss or self-loosening should be understood.

Are nylon insert lock nuts reusable?

Reuse capability depends on the nut design, application, temperature exposure, thread condition, required prevailing torque and governing specification. 

Reuse should not be assumed for every application.

Is a higher-strength automotive bolt always better?

No. Joint capacity may be limited by the mating thread, parent material, thread engagement, bearing surface or other components. 

Higher bolt strength does not automatically increase assembly strength.

What is the difference between torque and preload?

Torque is an input used during tightening. Preload is the tension generated in the fastener and corresponding clamp force in the joint. 

Friction strongly influences the relationship between them.

Which is better for automotive sheet metal: weld nut or rivet nut?

Weld nuts can be appropriate where welding is integrated into production and access/process conditions permit it.

 Rivet nuts are useful for selected thin-sheet applications requiring one-sided installation. 

Sheet material, thickness, access, load and production process should determine the choice.

Can rivet nuts be used in EV assemblies?

Yes, for selected applications where their grip range, parent material, hole geometry, setting process and required retention are appropriate.

 Their use does not by itself establish battery-system or safety-critical qualification.

Does zinc-nickel coating make an automotive bolt better?

Not automatically. Zn-Ni may be appropriate for demanding corrosion requirements, but coating selection should also consider friction, thread fit, strength, environment and OEM requirements.

What information should be sent when requesting an automotive fastener quotation?

Provide the 2D drawing, 3D model where available, part revision, application, material, mechanical requirements, 

mating component, surface treatment, installation method, environment, annual volume and applicable validation requirements.

Engineer the Joint, Not Just the Fastener

Reliable automotive fastening is not created by selecting the strongest bolt, the most expensive coating or the most aggressive locking feature.

It comes from controlling the complete system:

Joint Function + Parent Material + Fastener Geometry + Mechanical Properties + Thread Engagement

 + Preload + Friction + Locking Strategy + Coating + Installation + Validation

JUXIN FASTENERS supports OEM and industrial customers with standard and drawing-based threaded fastening components, 

including bolts, screws, lock nuts, rivet nuts, weld nuts, threaded inserts, self-clinching fasteners and custom components.

If you are developing a new automotive assembly, qualifying a second source or reviewing a threaded-joint failure, send the available technical package for evaluation.

For an effective RFQ, provide:

2D Drawing + 3D Model + Part / Revision + Application + Fastener Material + Mechanical Requirement + Mating Component 

+ Parent Material + Thread + Surface Treatment + Installation Method + Annual Volume

Where applicable, also include:

Sheet Thickness + Hole Size + Grip Range + Locking Requirement + Friction Requirement + Load Requirement + Environmental Requirement + Validation Standard

JUXIN FASTENERS

Automotive Threaded Fasteners | Automotive Bolts | Lock Nuts | Rivet Nuts | Weld Nuts | Threaded Inserts | Custom Fasteners

Email: info@juxinfasteners.com

Website: www.juxinfasteners.com