Blind rivets
How one-sided rivets form a joint, how grip and hole dimensions differ, and which performance claims depend on the product.
Tags: components, fasteners, riveting
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GESIPA's example 3.2 × 10 / 0.5–3.0 identifies 3.2 mm body diameter, 10 mm uninstalled body length and 0.5–3.0 mm catalog grip. Grip is the total stack thickness. Check the actual hole, bearing face, setting access and blind-side clearance separately, then use performance data for the named rivet and joint. GESIPA, “What Is the Grip Range for Blind Rivets?”, published June 5, 2026.
What a blind rivet is
A breakstem rivet sets from one side. Pulling the stem forms a second head on the blind side, then breaks the stem at its designed point. STANLEY Engineered Fastening's POP open-end description, GESIPA's account of setting.
A rivet nut accepts a separate screw, while a blind rivet stud provides an external thread. Conventional solid rivets require access for upsetting the second head. rivet nuts, GESIPA’s blind-rivet-nut overview, solid rivets, SFS’s comparison of blind and solid rivets.
Dimensions and joint fit
Grip is the combined thickness of the layers at the joint. A specified grip range is the minimum-to-maximum stack thickness over which a particular rivet is designed to set. Body length is a dimension of the uninstalled rivet; it is not itself the grip or a substitute for the manufacturer's grip range. GESIPA gives the example designation 3.2 x 10 / 0.5–3.0: 3.2 mm body diameter, 10 mm body length and 0.5–3.0 mm grip range. The values illustrate the notation for that example, not a general size rule. GESIPA, “What Is the Grip Range for Blind Rivets?”, published June 5, 2026.
The hole diameter is a separate fit requirement. An undersized hole can prevent insertion; an oversized or poorly formed hole can affect body expansion and joint performance. GESIPA identifies incorrect hole size and misalignment as causes of setting or joint problems. GESIPA setting and failure discussion. Synthesis: specified hole size, body diameter, grip range and available blind-side clearance belong to the same part-specific fit assessment. POP also identifies joint thickness, material, hole size/type and tool access as design variables. POP design guidelines.
Head form affects the bearing surface and finished profile. A dome head protrudes, a countersunk head requires a compatible countersink for a flush surface, and a large flange provides a wider bearing surface. SFS’s head-profile comparison explains these distinctions; POP’s open-end range lists all three head forms. Their availability does not establish the correct head for a particular joint.
Designs and bounded claims
An open-end breakstem rivet and a closed-end sealing rivet do not establish the same barrier or stem-retention behavior. STANLEY describes its POP closed-end family as cup-ended, with retention of the mandrel head and a seal against liquid or vapor for that family. Those are manufacturer claims for the named products and conditions; the word closed-end alone does not establish a watertight assembled joint. POP closed-end product description.
“Structural” and “retained mandrel” likewise need a named fastener and its specification. STANLEY calls Avdel Monobolt a structural breakstem, multi-grip rivet whose stem is mechanically locked into the body. This does not make ordinary open-end POP rivets structural or imply that every breakstem retains the same portion of its mandrel. Avdel Monobolt product description; POP open-end product range.
Body and mandrel materials can differ. POP's open-end range lists, for example, aluminum bodies with aluminum or steel mandrels, steel with steel, and stainless steel with stainless or steel mandrels. This is a product-range inventory, not a material compatibility approval. Joint materials, environment and required resistance to corrosion remain application-specific; GESIPA likewise treats strength, corrosion resistance and environment as selection factors. POP open-end material table; GESIPA grip-range article.
Interpreting a requirement
Synthesis: A stack thickness within a listed grip range supports only the thickness-fit part of selection. A joint also has a hole condition, head-bearing surface, accessible tool envelope, blind-side clearance, material combination and load/environment requirements. A product-specific shear or tensile value describes its stated test or catalog conditions; it does not alone prove a whole joint, fatigue life, sealing performance or suitability for a structural application. The exact fastener part and applicable manufacturer data are needed for those claims. POP design guidelines; GESIPA grip-range article.
This reference uses the public manufacturer pages linked above as accessed on October 30, 2026 PDT. The GESIPA grip article states June 5, 2026 and its setting/failure article states May 22, 2026 as publication dates. The cited POP, Avdel, SFS and GESIPA rivet-nut pages do not state a document revision in the inspected content. No full standard, product drawing, installation instruction, or customer-specific capability is established here.