Hobson technical document
Blind Rivet Head Types: Dome, Countersunk, Sealed, Multi-Grip, Peel and Triform
Hobson's one-page guide to blind rivet (pop rivet) head types and styles. It shows each common combination in section, explains the head and type codes, and lists the shell and mandrel material codes.
What this covers
- Head types
- Rivet types
- Shell and mandrel material codes
Key things to remember
The essentials from this document in plain words. Check the full document before you rely on a figure.
- The two most common heads are the truss or dome head, type 73, and the countersunk head, type 72.
- A dome head sits above the surface and is used in most industrial work; a countersunk head sits flush, with nothing above the face; a large flange head spreads the load on soft materials.
- Open rivets are not sealed by the stem. Sealed rivets close the shell around the mandrel so no water or air can get through.
- Multi-grip rivets hold across a range of grips; peel rivets grip soft materials without distortion and suit uneven surfaces; grooved rivets hold in less stiff materials such as plastic; triform rivets split into 3 parts as they set so they do not damage the material.
- Material codes, shell and mandrel: AS aluminium 5052 and zinc plated steel, 6S aluminium 5056 and zinc plated steel, SS steel and steel, STST stainless and stainless, MS Monel and steel, CP copper and steel, AA aluminium and aluminium.
Who it helps: Anyone choosing a rivet style for a job, or decoding a rivet part code.
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This document is published by Hobson Engineering, who supply this range to us. We show it here in full so you can read it next to the product; the summary above is ours. Read it on this page or download the PDF. For the most current version, ask us.