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Rivets · Huck Lockbolt Assemblies

Huck C50L Large-Diameter Lockbolt Assembly

8 catalogued sizes, dimensioned to BS 7805 Part 2:1997. Pick any row and the technical drawing redraws to it.

Huck C50L Large-Diameter Lockbolt Assembly to BS 7805 Part 2:1997 are catalogued in dia 12.7-34.9 mm. 8 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
BS 7805 Part 2:1997
Dia
12.7-34.9 mm
Catalogued sizes
8

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

Huck C50L Large-Diameter Lockbolt Assembly technical product image

Applications & Industries

The sectors that buy Huck C50L Large-Diameter Lockbolt Assembly to BS 7805 Part 2:1997, and the duty each one buys them for. Stocked from 12.7 to 34.9 (nominal diameter).

Industries that specify Huck C50L Large-Diameter Lockbolt Assembly

  • Earthmoving equipment Bucket, boom and chassis structures subject to shock and vibration.
  • Rail vehicles High-cycle structural assemblies that need a swaged mechanical lock.
  • Steel plant fabrication Thick-section one-side joints using large pin and collar combinations.
  • Heavy truck frames Large-diameter structural joints in rails, crossmembers and chassis sections.
  • Transport & bodywork Trailer, bus and van panels joined blind from one side.
  • Signage & cladding Fast, vibration-resistant fixing of thin material.

Typical applications

  • selecting a round, truss, countersunk or threaded-head pin form
  • matching the collar profile to the joint access and bearing surface
  • building permanent connections where a large removable bolt is impractical
  • forming a large-diameter structural pin-and-collar joint
  • riveted pivots that must stay tight but still turn
  • permanent joints in thin sheet where a threaded fastener would loosen

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 treat the swaged collar as a conventional nut if the joint must be removed without cutting.
  • Not for a joint that has to come apart in service — removal means drilling the rivet out.

Full application guide: where Huck C50L Large-Diameter Lockbolt Assembly are used, how to specify them, and the cases they are wrong for

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.

Sends the selected values to the quote form below.

Request a Quotation for Huck C50L Large-Diameter Lockbolt Assembly

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

Request a Quotation

Specification
Business Information

Dimensions & Specifications (BS 7805 Part 2:1997)

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

Nominal diameter (mm)Pin head stylesCollar stylesStrength gradeAssemblyMaterial optionsReference standard
12.7round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
15.9round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
19.1round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
22.2round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
25.4round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
28.6round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
31.8round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997
34.9round / truss / countersunk / threaded-headstandard / flanged / low-profile8.8pin + collarsteel / stainless steel / aluminum alloyBS 7805 Part 2:1997

Huck C50L Large-Diameter Lockbolt Assembly conform to BS 7805 Part 2:1997. As rivets, they are specified by the dimensions in the table below; this page also covers materials, finishes and typical uses.

What Are Huck C50L Large-Diameter Lockbolt Assembly?

Huck C50L Large-Diameter Lockbolt Assembly are rivets defined by BS 7805 Part 2:1997. They are selected by nominal diameter and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.

Materials & Finishes

Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.

Pricing

Huck C50L Large-Diameter Lockbolt Assembly are supplied to order. Pricing starts from approximately US$2.25 per piece for standard sizes in carbon steel; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

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.

Video: Huck C50L Large-Diameter Lockbolt Assembly

Applifast - HUCK BobTail Benefits Video

Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.

Frequently Asked Questions

Which standard governs Huck C50L Large-Diameter Lockbolt Assembly?

Huck C50L Large-Diameter Lockbolt Assembly are manufactured to BS 7805 Part 2:1997. The dimensional values on this page follow that standard.

What sizes are available for Huck C50L Large-Diameter Lockbolt Assembly?

The table on this page lists 8 sizes for Huck C50L Large-Diameter Lockbolt Assembly, ranging from 12.7 to 34.9. Sizes outside the table can be quoted on request.

In which materials are Huck C50L Large-Diameter Lockbolt Assembly supplied?

Huck C50L Large-Diameter Lockbolt Assembly are supplied in aluminum, steel and stainless, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Huck C50L Large-Diameter Lockbolt Assembly.

How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.