Closed-End Round-Body Blind Rivet Nuts manufactured in A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70) are dimensioned to Trade series (closed-end blind rivet nuts). The sections below give the mechanical and physical properties of the grade, its behavior in corrosive and elevated-temperature service, and the full size table.
Why Choose A2 Stainless Steel for Closed-End Round-Body Blind Rivet Nuts
The most common stainless group for indoor and general outdoor fasteners. For closed-end round-body blind rivet nuts, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70 |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C, subject to the property class and the joint |
| Corrosion characteristic | Good general corrosion resistance |
Corrosion Behavior in Service
A2 (304) gives excellent atmospheric and most-water corrosion resistance and is the most common stainless for Closed-End Round-Body Blind Rivet Nuts in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Comparable Grades
For Closed-End Round-Body Blind Rivet Nuts, 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 Closed-End Round-Body Blind Rivet Nuts Available in A2 Stainless Steel
| Thread size | Pitch (mm) | Grip range (mm) | Installation hole (mm) | Head diameter (mm) | End | Material options |
|---|---|---|---|---|---|---|
| M4 | 0.7 | 0.5~2.5 | 6.1 | 9.0 | closed | zinc-plated steel / stainless steel / aluminum alloy |
| M5 | 0.8 | 0.5~3.0 | 7.1 | 10.0 | closed | zinc-plated steel / stainless steel / aluminum alloy |
| M6 | 1.0 | 0.5~3.0 / 3.0~5.0 | 9.1 | 12.0 | closed | zinc-plated steel / stainless steel / aluminum alloy |
| M8 | 1.25 | 0.5~3.0 / 3.0~5.5 | 11.1 | 15.0 | closed | zinc-plated steel / stainless steel / aluminum alloy |
| M10 | 1.5 | 1.0~3.5 | 13.1 | 17.0 | closed | zinc-plated steel / stainless steel / aluminum alloy |
