A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70) is the most common stainless group for indoor and general outdoor fasteners. When solid rivets are specified in this grade, the dimensions remain per ISO 1051 / DIN 660 / DIN 661; the material determines corrosion behavior (good general corrosion resistance) and the service temperature range (approx. -200 °C to +400 °C, subject to the property class and the joint). Both are covered below with the size table.
Why Choose A2 Stainless Steel for Solid Rivets
The most common stainless group for indoor and general outdoor fasteners. For solid rivets, 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 |
Galvanic & Galling Considerations
For stainless solid rivets the compatibility question is galvanic rather than galling: joined to aluminum or galvanized steel in wet service, stainless drives corrosion of the less-noble metal. Isolate with a coating, sleeve or non-conductive washer where the joint sees moisture. Note also that stainless is softer than hardened carbon steel, so where the part carries a wear or shear duty, check the load against the grade before substituting.
Comparable Grades
For Solid Rivets, the alternative stainless grade is A4 (316). The practical dividing line is chlorides: A2 (304) is fine until salt is involved, and A4 (316) exists for the cases where it is — coastal, marine and road-salt service. Neither reaches the strength of a plated class 8.8 or 10.9 fastener.
Using Stainless Fasteners in Aluminum
Expect the aluminum to corrode, not the fastener — stainless sits higher in the galvanic series, so the aluminum is the one that gives up material. A small fastener in a thick section spreads the loss over a large area and is usually fine; a large fastener in thin sheet concentrates it and is not. Keep water out of the joint, or isolate the two metals with a nylon or coated washer and a sealant.
Sizes of Solid Rivets Available in A2 Stainless Steel
| Nominal diameter (mm) | Common length range (mm) | Head diameter dk (mm) | Head height k (mm) | Countersunk head dia (mm) | Reference standard |
|---|---|---|---|---|---|
| 1.0 | 2~10 | 2.0 | 0.7 | 1.9 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 1.2 | 2~12 | 2.4 | 0.8 | 2.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 1.6 | 3~16 | 3.2 | 1.0 | 3.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 2.0 | 3~20 | 4.0 | 1.3 | 3.8 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 2.5 | 4~25 | 5.0 | 1.6 | 4.7 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 3.0 | 4~30 | 6.0 | 1.9 | 5.6 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 4.0 | 5~40 | 8.0 | 2.5 | 7.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 5.0 | 6~50 | 10.0 | 3.1 | 9.4 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 6.0 | 8~60 | 12.0 | 3.8 | 11.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 8.0 | 10~80 | 16.0 | 5.0 | 15.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 10.0 | 14~100 | 20.0 | 6.3 | 18.7 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 12.0 | 16~120 | 24.0 | 7.5 | 22.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 14.0 | 18~140 | 28.0 | 8.8 | 26.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 16.0 | 20~160 | 32.0 | 10.0 | 30.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 18.0 | 22~180 | 36.0 | 11.0 | 34.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 20.0 | 25~200 | 40.0 | 12.5 | 37.5 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 22.0 | 28~200 | 44.0 | 13.8 | 41.2 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
| 25.0 | 32~200 | 50.0 | 15.6 | 47.0 | ISO 1051 / DIN 660 (round) / DIN 661 (countersunk) |
Dimensions are independent of the material: every size above is available in A2 Stainless Steel.
Custom manufacturing · Made to drawing
Need this rivet in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. Grip range is what a special usually changes — a joint thickness that falls between two standard rivets. Made by cold heading or drawing.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
