High-Strength Locking-Collar Rivets

High-Strength Lockbolts and Ring-Groove Locking-Collar Rivets for OEM Structural Assemblies

Product Overview

JUXIN FASTENERS supplies ring-groove locking-collar fastening solutions for OEM manufacturing, industrial equipment and structural metal assemblies.

These fasteners are commonly described in the international market as:

• High-Strength Lockbolts

• Locking-Collar Rivets

• Ring-Groove Rivets

• Ring-Groove Lockbolts

• Two-Piece Structural Fasteners

• Swage-Collar Fasteners

• Pin-and-Collar Fasteners

Unlike conventional blind rivets, typical two-piece lockbolts consist of a grooved pin and a separate deformable locking collar.

During installation, a compatible tool develops the required joint clamp and swages the collar into the locking grooves of the pin.

This creates a permanent mechanically locked connection.

Typical lockbolt installation requires access to both sides of the joined components.

Lockbolt systems are used where engineers require controlled fastening, vibration resistance, installation efficiency and structural joint performance appropriate to the selected fastener.

Actual mechanical properties depend on the pin material, collar material, geometry, installation system and approved engineering specification.

Available JUXIN Material Families

JUXIN identifies three material families for technical evaluation and quotation.

These references identify the product families provided in the original JUXIN documentation.

The actual pin alloy, collar alloy, material condition, coating and mechanical performance must be verified for each selected part number.

The pin and collar should be specified as separate components rather than described as a rivet body and blind-rivet mandrel.

Product Identification and Technical Specifications

Engineering Solution 1 — How a Lockbolt Works

A conventional two-piece lockbolt assembly consists of a pin and a collar.

The pin passes through the aligned mounting holes of the joined components.

The collar is positioned over the pin on the opposite side.

A compatible installation tool applies the required pulling and swaging forces.

As the tool operates, the joint is drawn together and the collar is plastically deformed into the pin's locking grooves.

The swaged collar creates a permanent mechanical connection with the grooved pin.

Depending on the system, the installation may conclude with a designed pintail break or with release of the tool from an unbroken pin.

The exact installation sequence must follow the approved fastener and tooling instructions.

Engineering Solution 2 — Lockbolts vs. Structural Blind Rivets

The two fastener types should not be substituted without engineering evaluation.

Engineering Solution 3 — Ring-Groove and Collar Locking Mechanism

The ring grooves provide a mechanical interface between the pin and the swaged collar.

During installation, the collar material flows into the grooves.

The resulting connection resists separation through mechanical engagement between the two components.

Important design parameters include:

• Pin diameter

• Groove geometry

• Groove spacing

• Collar dimensions

• Collar material

• Pin material

• Grip length

• Installation force

• Tool nose assembly

• Installed collar condition

A compatible pin and collar combination is essential.

Collars from different product systems must not be assumed interchangeable.

Engineering Solution 4 — Break-Pintail Lockbolts

Certain lockbolt systems use a break-pintail design.

The installation tool grips the pulling section of the pin.

As the tool applies force, the joint is tightened and the collar is swaged into the locking grooves.

After the required installation sequence, the excess pintail breaks at a designed location.

Engineering considerations include:

• Breakneck geometry

• Required pulling force

• Swage completion

• Break location

• Pintail collection

• Tool recoil

• Installed pin projection

The pintail must break only as intended by the approved system.

Engineering Solution 5 — Pintail-Less Lockbolts

Other lockbolt systems use a pintail-less or non-break-stem design.

These systems are designed to complete the collar swaging operation without breaking off an installation tail.

Potential system-level advantages may include reduced discarded metal, reduced installation noise and simplified handling of spent tails.

However, these characteristics depend on the actual fastener and tooling design.

Huck BobTail is a proprietary example of a pintail-less lockbolt system.

The original JUXIN information does not establish that JX-D-L-AL, JX-D-L-ST or JX-D-L-SS are equivalent to Huck BobTail.

Engineering Solution 6 — Continuous-Groove Lockbolts

Certain lockbolt systems incorporate an extended or continuous groove configuration.

This can affect the available grip range and collar positioning.

Engineers should verify:

• Groove length

• Effective grip range

• Pin projection

• Collar compatibility

• Installation tooling

• Final installed dimensions

Continuous-groove construction should not be assumed for every ring-groove fastener.

Engineering Solution 7 — Aluminum Lockbolts

JUXIN Reference: JX-D-L-AL

The aluminum material family may be considered for applications where weight reduction and compatible material selection are important.

Potential applications include lightweight equipment frames, selected transportation components and aluminum structural assemblies.

Engineering considerations include:

• Pin alloy

• Collar alloy

• Material temper

• Shear strength

• Tensile strength

• Joint clamp requirements

• Corrosion compatibility

• Fatigue performance

• Installation tooling

The original documentation mentions 7A03 aluminum for the pin and 5052 aluminum for the collar.

These exact grades require verification before being adopted as confirmed product specifications.

Aluminum lockbolts should not automatically be assigned the same mechanical performance as steel lockbolts.

Engineering Solution 8 — Steel Lockbolts

JUXIN Reference: JX-D-L-ST

Steel lockbolts may be considered for mechanically demanding industrial assemblies.

Potential applications include commercial vehicles, heavy equipment, steel structures and industrial machinery.

Important engineering considerations include:

• Pin steel grade

• Collar steel grade

• Mechanical properties

• Heat treatment

• Surface coating

• Joint clamp requirements

• Shear and tensile capacity

• Fatigue performance

• Corrosion exposure

The original documentation refers to 35 steel and 10 steel.

These descriptions require verification against current material specifications and actual manufacturing records.

No strength class, coating performance or structural approval is claimed without supporting evidence.

Engineering Solution 9 — Stainless Steel Lockbolts

JUXIN Reference: JX-D-L-SS

Stainless steel lockbolts may be considered for applications where appropriate corrosion resistance is required.

Potential applications include industrial equipment, outdoor enclosures, stainless steel structures and selected transportation equipment.

Important considerations include:

• Pin stainless steel grade

• Collar stainless steel grade

• Mechanical properties

• Material compatibility

• Corrosion resistance

• Chloride exposure

• Galling behavior

• Installation force

• Joint fatigue performance

The original documentation refers to 0Cr18Ni9 and 1Cr18Ni9 stainless steel.

These are legacy material designations and should not automatically be converted to a current international grade without verification.

No specific AISI 304, AISI 316, A2 or A4 specification is claimed.

Engineering Solution 10 — Shear Strength

Shear loading acts across the fastener and joint interface.

Lockbolt shear capacity depends on:

• Pin diameter

• Pin material

• Pin geometry

• Shear-plane location

• Joint thickness

• Hole dimensions

• Installation quality

The connected materials may also fail through bearing deformation or edge failure.

Actual shear performance must be verified for the selected lockbolt system.

Engineering Solution 11 — Tensile Strength

Tensile loading acts primarily along the fastener axis.

Potential failure mechanisms include:

• Pin fracture

• Collar failure

• Collar disengagement

• Head-side pull-through

• Panel deformation

• Local material failure

The collar's engagement with the pin grooves is a critical part of the tensile load path.

Actual tensile performance must be verified using the applicable product specification.

Engineering Solution 12 — Clamp Force and Joint Integrity

Clamp force is an important characteristic of many lockbolt systems.

During installation, the pin and collar system draws the joined components together.

The resulting clamp depends on the fastener design, material properties, tool operation and joint characteristics.

Relevant parameters include:

• Joint thickness

• Material stiffness

• Surface condition

• Installation force

• Collar swaging

• Joint relaxation

• Thermal cycling

No numerical clamp force is claimed without verified product data.

Engineering Solution 13 — Vibration and Fatigue Resistance

Properly engineered lockbolt connections can provide useful resistance to loosening in vibration-exposed assemblies.

However, vibration resistance is not universal across every material or geometry.

Engineers should evaluate:

• Joint stiffness

• Clamp retention

• Pin and collar engagement

• Hole fit

• Fastener spacing

• Cyclic loading

• Fatigue

• Corrosion

• Installation quality

Critical applications should use representative joint testing and approved acceptance criteria.

Engineering Solution 14 — Thermal Expansion and Contraction

Industrial equipment may experience repeated temperature changes.

Differential thermal expansion between the pin, collar and joined components can affect joint loading.

Important considerations include:

• Pin material

• Collar material

• Mating material

• Operating temperature

• Temperature cycling

• Joint stiffness

• Clamp relaxation

Lockbolts should not be described as universally unaffected by thermal expansion or contraction.

Engineering Solution 15 — Hole Diameter and Joint Preparation

Hole quality is essential for reliable lockbolt installation.

Engineers should verify:

• Hole diameter

• Hole tolerance

• Hole alignment

• Burr condition

• Material thickness

• Edge distance

• Fastener spacing

• Joint gap

• Surface coatings

Oversized, slotted or damaged holes require specific engineering approval.

A lockbolt should not be used to compensate for an unacceptable hole condition without validation.

Engineering Solution 16 — Grip Range and Pin Length

The selected pin must accommodate the complete material stack-up and the compatible collar.

Important parameters include:

• Minimum grip

• Maximum grip

• Pin length

• Collar thickness

• Available locking grooves

• Tool engagement length

• Installed pin projection

Incorrect grip selection may prevent full collar swaging or proper joint formation.

Engineering Solution 17 — Collar Compatibility

A lockbolt collar is an engineered component, not a generic washer or nut.

The collar must be compatible with:

• Pin diameter

• Groove geometry

• Material grade

• Collar hardness

• Swaging force

• Nose assembly

• Required joint performance

A collar sold separately by a distributor does not establish interchangeability with every lockbolt pin.

For OEM purchasing, the pin and collar should be specified as a matched system.

Engineering Solution 18 — Installation Tooling

Lockbolts generally require dedicated hydraulic, pneumatic or other approved installation equipment.

Tool selection depends on:

• Pin diameter

• Pin geometry

• Collar dimensions

• Pulling force

• Swaging force

• Tool stroke

• Nose assembly

• Installation access

• Production cycle time

• Tool maintenance

Some lockbolt systems use different tooling for break-pintail and pintail-less configurations.

The actual JUXIN fastener must be matched to its approved tool and nose assembly.

Typical Installation Procedure

The following is a general procedure for a conventional two-piece lockbolt system.

1. Confirm the approved pin and collar part numbers.

2. Verify pin and collar material specifications.

3. Check the complete joint stack-up.

4. Select the correct grip range.

5. Prepare aligned mounting holes within the approved tolerances.

6. Remove burrs and inspect the joint surfaces.

7. Insert the pin through the assembled components.

8. Position the compatible collar on the opposite side.

9. Select the approved installation tool and nose assembly.

10. Engage the tool with the pin.

11. Activate the tool according to the approved installation procedure.

12. Allow the collar to be swaged into the locking grooves.

13. Complete the pintail break if required by the selected design.

14. Release the tool after the specified installation cycle.

15. Inspect the collar swage, pin projection and joint condition.

16. Verify the installation against the approved acceptance criteria.

Pintail-less systems follow their own installation sequence and must not be treated as break-pintail systems.

Engineering Solution 19 — Production Inspection

Production quality control should include:

• Pin identification

• Collar identification

• Material verification

• Dimensional inspection

• Hole diameter

• Grip range

• Tool identification

• Nose assembly condition

• Collar orientation

• Swage completion

• Installed collar geometry

• Pin projection

• Pintail break condition, where applicable

• Joint gap

• Sampling and traceability

Certain proprietary lockbolt systems include dedicated installation indicators or inspection gauges.

Such features should not be assumed for JUXIN products without verification.

Engineering Solution 20 — Metric and Inch Size Reference

Common industrial lockbolt diameter references may include:

These are general dimensional references, not confirmed available sizes for the JUXIN JX-D-L series.

Actual metric and inch-designated lockbolts must be verified for pin diameter, hole size, grip range, collar compatibility and tooling before substitution.

Industrial Applications and Engineering Solutions

Lockbolts may be evaluated for industrial assemblies requiring permanent two-piece mechanical fastening and appropriate structural performance.

The following applications are potential engineering uses, not product-specific approvals.

1. Commercial Vehicle Manufacturing

Lockbolts may be considered for selected truck and commercial vehicle assemblies requiring permanent structural fastening.

Relevant factors include fatigue, vibration, corrosion, installation access and OEM qualification.

2. Trailer Manufacturing

Trailers may incorporate steel and aluminum structural assemblies.

Lockbolts may be evaluated where the approved design requires a mechanically locked pin-and-collar connection.

3. Heavy Equipment

Construction and mining equipment may require permanent fastening in vibration-exposed assemblies.

Mechanical strength, fatigue, corrosion and service conditions must be validated.

4. Agricultural Machinery

Agricultural equipment may incorporate structural frames, brackets and machinery components.

Lockbolts may be evaluated for suitable permanent connections.

5. Rail Equipment

Rail equipment may use lockbolt fastening systems in approved structural or auxiliary assemblies.

Fatigue, vibration, fire and smoke, traceability and project-specific requirements must be reviewed.

6. Industrial Steel Structures

Steel structures may incorporate mechanically fastened joints.

Any use of lockbolts in load-bearing construction requires compliance with the applicable structural design and qualification requirements.

7. Industrial Machinery Frames

Machinery frames may require controlled permanent mechanical connections.

Joint stiffness, alignment, loading and maintenance requirements must be evaluated.

8. Material Handling Equipment

Conveyors, lifting-related equipment and handling systems may include structurally loaded metal assemblies.

Safety-critical applications require appropriate engineering qualification.

9. Energy Infrastructure

Energy equipment may incorporate structural frames, brackets and support assemblies.

Lockbolts may be evaluated where the selected material and mechanical properties meet the design requirements.

10. Power Distribution Equipment

Power distribution infrastructure may use structural support frames and auxiliary equipment assemblies.

Electrical bonding and grounding must be evaluated separately.

11. Data Center Infrastructure

Data center projects may include heavy equipment supports, power-system frames and auxiliary structural assemblies.

Lockbolts may be considered where two-sided access and permanent fastening are appropriate.

12. Industrial Enclosures

Large industrial enclosures may use lockbolts for selected structural connections.

The joint must be evaluated for strength, access, corrosion and maintenance requirements.

13. Container and Modular Equipment

Containers and modular equipment may include structural steel or aluminum connections.

Lockbolts may be considered for suitable approved joints.

14. Marine Auxiliary Structures

Marine-related equipment may require corrosion-resistant fastening.

Stainless steel or protected steel lockbolts must be selected according to the actual exposure conditions.

15. OEM Metal Fabrication

OEM manufacturers may specify lockbolts for repetitive production assemblies requiring defined installation procedures and consistent mechanical fastening.

Material Selection Matrix

International Standards and Technical Qualification

Lockbolt systems may be specified using manufacturer technical specifications, customer-approved engineering drawings and applicable industry standards.

The term ring-groove rivet does not identify one universal international product standard.

Different lockbolt systems use different groove geometries, collars, installation procedures and mechanical performance requirements.

Technical qualification should establish:

• Pin material grade

• Collar material grade

• Pin dimensions

• Collar dimensions

• Groove geometry

• Grip range

• Hole requirements

• Shear and tensile strength

• Clamp requirements

• Fatigue performance

• Installation tooling

• Corrosion protection

• Inspection criteria

Where ISO, DIN, EN, ASTM, SAE or customer-specific requirements apply, conformity must be verified against the actual fastener.

Huck Magna-Grip and Huck BobTail are proprietary fastening systems. Product equivalence must not be inferred from appearance or generic lockbolt terminology.

No unverified certification or proprietary system equivalence is claimed.

OEM Procurement and Supplier Development

For purchasing managers, supply chain managers, production managers and engineers, lockbolts should be sourced as complete fastening systems.

A technical RFQ should identify:

• Approved pin drawing

• Approved collar drawing

• Material family

• Pin material grade

• Collar material grade

• Pin diameter

• Pin length

• Head style

• Grip range

• Hole diameter

• Lock-groove configuration

• Break-pintail or pintail-less design

• Required shear strength

• Required tensile strength

• Required clamp performance

• Corrosion requirements

• Installation tooling

• Inspection requirements

• Annual demand forecast

Purchasing teams should confirm whether quotations include pins only, collars only or matched pin-and-collar assemblies.

The total installed cost should consider fastener cost, tooling, installation cycle time, inspection, scrap and maintenance.

Frequently Asked Questions

What is a locking-collar rivet?

It is a two-piece fastener consisting of a grooved pin and a collar that is mechanically swaged into the pin grooves during installation.

Are locking-collar rivets the same as lockbolts?

Locking-collar rivets is a common market description for certain two-piece lockbolt systems. Exact designs vary.

Are ring-groove rivets blind rivets?

Typical two-piece ring-groove lockbolts require access to both sides of the assembly and are not conventional one-sided blind rivets.

What is the difference between Magna-Grip and BobTail?

They refer to distinct proprietary lockbolt product systems. Their pin geometry, installation method and tooling requirements must be evaluated separately.

Does every lockbolt break off a pintail?

No. Some designs use a break-pintail, while pintail-less systems complete installation without a pin break.

Can lockbolt pins and collars be purchased separately?

Some suppliers offer separate components. However, the pin and collar must be verified as a compatible fastening system.

Are aluminum lockbolts as strong as steel lockbolts?

Not necessarily. Mechanical strength depends on the actual material grades, geometry and verified product data.

Are stainless steel lockbolts corrosion-proof?

No. Corrosion resistance depends on the alloy, environment and joint design.

Can lockbolts withstand vibration?

Properly engineered lockbolt systems can provide useful vibration resistance, but the complete joint must be validated.

Can a lockbolt replace a conventional bolt and nut?

Only after engineering review of the mechanical requirements, installation access, serviceability and applicable specifications.

Can JUXIN review custom ring-groove lockbolt drawings?

Customer drawings, material specifications, collar requirements, mechanical performance targets and annual demand can be submitted for technical review and quotation.

Request a High-Strength Lockbolt OEM Quotation

JUXIN FASTENERS supplies industrial fastening solutions for OEM manufacturing, heavy equipment and structural metal assemblies.

For technical review and quotation, please provide:

• 2D engineering drawing or 3D CAD model

• JUXIN reference: JX-D-L-AL, JX-D-L-ST or JX-D-L-SS

• Pin material specification

• Collar material specification

• Pin diameter and length

• Head style

• Groove geometry

• Grip range

• Hole diameter and tolerance

• Required shear and tensile performance

• Clamp and fatigue requirements

• Break-pintail or pintail-less configuration

• Installation tooling and nose assembly requirements

• Surface coating and corrosion requirements

• Inspection and traceability requirements

• Pin and collar packaging requirements

• Expected order quantity

• Annual demand forecast

• Target delivery schedule

Email: info@juxinfasteners.com

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

JUXIN FASTENERS — High-Strength Lockbolts and Ring-Groove Locking-Collar Rivets for Global OEM Manufacturing.

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.