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Rivets · BS 7805 Part 1:1997

A2 (304) Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly

Mechanical properties, corrosion behaviour and the full dimensional range for this grade.

A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly are supplied to ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70. Corrosion behaviour is good general corrosion resistance, the material is largely non-magnetic, and the usable service range is approx. -200 °C to +400 °C, subject to the property class and the joint. In practice this grade is the most common stainless group for indoor and general outdoor fasteners.

Grade
ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70
Corrosion resistance
Good general corrosion resistance
Magnetic response
Largely non-magnetic
Service temperature
approx. -200 °C to +400 °C, subject to the property class and the joint

Property values are typical for the grade. Certified mechanical test data is available on request for production orders.

A2 (304) Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly reference image

A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly combine the dimensional form of BS 7805 Part 1:1997 with the material properties of grade ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70: good general corrosion resistance, largely non-magnetic, service range approx. -200 °C to +400 °C, subject to the property class and the joint. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.

Why Choose A2 Stainless Steel for Huck C6L Small-Diameter Lockbolt Assembly

The most common stainless group for indoor and general outdoor fasteners. For huck c6l small-diameter lockbolt assembly, this matters when good general corrosion resistance is the primary requirement.

Mechanical & Physical Properties

Grade designationISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70
Magnetic responseLargely non-magnetic
Service temperatureapprox. -200 °C to +400 °C, subject to the property class and the joint
Corrosion characteristicGood general corrosion resistance

Galvanic & Galling Considerations

For stainless huck c6l small-diameter lockbolt assembly the compatibility question is galvanic rather than galling: joined to aluminum or galvanized steel in wet service, stainless drives corrosion of the less-noble metal. Isolate with a coating, sleeve or non-conductive washer where the joint sees moisture. Note also that stainless is softer than hardened carbon steel, so where the part carries a wear or shear duty, check the load against the grade before substituting.

Comparable Grades

For Huck C6L Small-Diameter Lockbolt Assembly, the alternative stainless grade is A4 (316). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.

Using Stainless Fasteners in Aluminum

Stainless steel is more noble than aluminum, so in the presence of an electrolyte — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. The effect is driven by the area ratio: a small stainless fastener in a large aluminum section is normally acceptable, while a large stainless fastener in thin aluminum is not. Where the joint is wet, isolate the two metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.

Sizes of Huck C6L Small-Diameter Lockbolt Assembly Available in A2 Stainless Steel

Nominal diameter (mm)Pin head stylesCollar stylesStrength gradeAssemblyMaterial optionsReference standard
4.8brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
6.4brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
7.9brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
9.5brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

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Specification
Business Information

Dimensions & Specifications (BS 7805 Part 1:1997)

Nominal diameter (mm)Pin head stylesCollar stylesStrength gradeAssemblyMaterial optionsReference standard
4.8brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
6.4brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
7.9brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997
9.5brazier / truss / countersunkstandard / flanged / wide-flanged / low-profile5.8pin + collarcarbon steel / stainless steel / aluminum alloyBS 7805 Part 1:1997

Applications & Industries

The sectors that buy Huck C6L Small-Diameter Lockbolt Assembly to BS 7805 Part 1:1997, and the duty each one buys them for. Stocked from 4.8 to 9.5 (nominal diameter).

Industries that specify Huck C6L Small-Diameter Lockbolt Assembly

  • Rail interiors Vibration-exposed brackets and interior structures assembled from one accessible side.
  • Bus manufacturing Light structural joints where the collar is swaged after the pin is inserted.
  • Sheet-metal production Repeatable pin-and-collar installation where the rear face cannot be held.
  • Trailer bodies Small-diameter permanent joints in side rails, floor members and formed panels.
  • Transport & bodywork Trailer, bus and van panels joined blind from one side.
  • Signage & cladding Fast, vibration-resistant fixing of thin material.

Typical applications

  • choosing brazier, truss or countersunk pin head geometry for the panel face
  • matching collar style and grip to the combined material thickness
  • installing a lockbolt where vibration would work a removable nut loose
  • creating a permanent small-diameter pin-and-collar joint
  • permanent joints in thin sheet where a threaded fastener would loosen
  • blind fixing where only one side can be reached

Service conditions to specify against

Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
Vibration
Specified where cyclic load would loosen a plain nut or screw — rotating plant, rail, mobile equipment and anything that is not re-torqued in service.

Where to use something else

  • Do not specify this permanent assembly where routine removal is part of the service plan.
  • Not for a joint that has to come apart in service — removal means drilling the rivet out.

Full application guide: where Huck C6L Small-Diameter Lockbolt Assembly are used, how to specify them, and the cases they are wrong for

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

Are A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly magnetic?

A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly are largely non-magnetic.

What corrosion resistance do A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly offer?

A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly provide good general corrosion resistance with a service range of approx. -200 °C to +400 °C, subject to the property class and the joint.

Should I choose A2 Stainless Steel or A4 (316) for Huck C6L Small-Diameter Lockbolt Assembly?

For Huck C6L Small-Diameter Lockbolt Assembly, A2 Stainless Steel suits general indoor and outdoor use; A4 (316) is preferred for marine, coastal and chemical environments. Choose by corrosion exposure first.

Can A2 Stainless Steel Huck C6L Small-Diameter Lockbolt Assembly gall during installation?

Yes — stainless on stainless is prone to thread galling under load, especially at smaller sizes. Use an anti-galling lubricant or wax thread compound, and slow the tightening rate where possible.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.