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Rivets · Trade series (Avdel Monobolt) · Application guide

What Are Structural Breakstem Blind Rivets Used For?

Typical applications, the industries that specify structural breakstem blind rivets, and how to choose the right size, material and finish for the joint.

Structural Breakstem Blind Rivets are used for structural blind riveting with a mechanically retained breakstem. They are manufactured to Trade series (Avdel Monobolt), and selection is driven by the nominal diameter, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Structural blind riveting with a mechanically retained breakstem
Governing standard
Trade series (Avdel Monobolt)
Nominal diameter range
4.8 mm to 10 mm
Category
Rivets

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Structural Breakstem Blind Rivets Used For? application image

Structural Breakstem Blind Rivets (Trade series (Avdel Monobolt)) are specified where the joint requires structural blind riveting with a mechanically retained breakstem. The sections below cover the typical end-uses by industry, the size and material decisions for each, assembly practice, and the applications this fastener type is not suited to. Stocked across roughly 4.8 mm to 10 mm, they cover general to heavy-duty work.

Typical Applications for Structural Breakstem Blind Rivets

The most common settings where these are specified:

  • Commercial vehicles: structural blind joints in frames and box sections.
  • Cladding systems: one-side sheet fastening with a mechanically retained stem.
  • HVAC enclosures: high-volume structural riveting without rear access.
  • Rail equipment: vibration-exposed joints using a filled structural rivet body.

How to Specify Structural Breakstem Blind Rivets for Your Application

  • Size: Select on nominal diameter, then on the hole tolerance and fit class — the fit, not the diameter alone, determines whether the part locates or slips. This product spans 4.8 mm–10 mm; check the full table below for the exact dimensions of each size.
  • Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to Trade series (Avdel Monobolt). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Drill the hole 0.1 mm over the nominal rivet diameter and deburr both sides before setting.
  • Grip range must match the total joint thickness — a rivet set outside its grip range clamps poorly and works loose.

Common Selection Mistakes with Structural Breakstem Blind Rivets

  • Setting a rivet outside its grip range, which leaves the joint loose from day one.
  • Using aluminum rivets on steel sheet outdoors — galvanic corrosion eats the rivet.

Where Structural Breakstem Blind Rivets Are Not the Right Choice

Not where the joint must later be disassembled, and not for high-tension structural connections.

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.

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

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Specification
Business Information

Dimensions & Specifications (Trade series (Avdel Monobolt))

Nominal diameter (mm)Equivalent inch diameterGrip typeStem lockMaterial optionsJoint option
4.83/16multi-grip structuralmechanically lockedaluminum alloy / steel / 304Cu-A2 / 316-A4 stainlesssealed-joint capable
6.41/4multi-grip structuralmechanically lockedaluminum alloy / steel / 304Cu-A2 / 316-A4 stainlesssealed-joint capable
103/8multi-grip structuralmechanically lockedaluminum alloy / steel / 304Cu-A2 / 316-A4 stainlesssealed-joint capable
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 Structural Breakstem Blind Rivets made to a recognized standard?

Yes — they are manufactured to Trade series (Avdel Monobolt), so dimensions are interchangeable between suppliers when you quote the standard on your order.

What are Structural Breakstem Blind Rivets used for?

Structural blind riveting with a mechanically retained breakstem. They are supplied to Trade series (Avdel Monobolt).

Which industries use Structural Breakstem Blind Rivets?

They are commonly specified in rail equipment, commercial vehicles and cladding systems, among other sectors.

How do I choose the right size of Structural Breakstem Blind Rivets?

Select on nominal diameter and on the fit the assembly requires. This product is available from 4.8 mm to 10 mm; the full dimension table on this page lists each size.

Can I get a quote for Structural Breakstem Blind Rivets in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.