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 clevis pins (iso 2341 / din 1444) are specified in this grade, the dimensions remain per ISO 2341; 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 Clevis Pins (ISO 2341 / DIN 1444)
The most common stainless group for indoor and general outdoor fasteners. For clevis pins (iso 2341 / din 1444), 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 clevis pins (iso 2341 / din 1444) 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 Clevis Pins (ISO 2341 / DIN 1444), the alternative stainless grade is A4 (316). Choose A2 (304) for general use and A4 (316) wherever chlorides are present; the molybdenum in A4 is the whole difference. Remember that stainless is the corrosion answer, not the strength answer — for load, look at class 8.8 or 10.9 instead.
Using Stainless Fasteners in Aluminum
Stainless steel is more noble than aluminum, so with an electrolyte present — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. Area ratio decides how bad it gets: a small stainless fastener in a large aluminum section is normally acceptable, a large stainless fastener in thin aluminum is not. Where the joint gets wet, isolate the metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.
Sizes of Clevis Pins (ISO 2341 / DIN 1444) Available in A2 Stainless Steel
| Pin diameter d (mm) | Grip length (mm) | Head diameter (mm) | Head height (mm) | Cross hole diameter (mm) | Split pin size | Material | Reference standard |
|---|---|---|---|---|---|---|---|
| 4 | 12 | 7 | 2.5 | 1.6 | 1.6 x 16 | Steel 4.6 / A2 | ISO 2341 |
| 5 | 16 | 9 | 3.0 | 1.6 | 1.6 x 20 | Steel 4.6 / A2 | ISO 2341 |
| 6 | 20 | 10 | 3.5 | 2.0 | 2 x 20 | Steel 4.6 / A2 | ISO 2341 |
| 8 | 25 | 14 | 4.0 | 2.5 | 2.5 x 25 | Steel 4.6 / A2 | ISO 2341 |
| 10 | 32 | 18 | 4.5 | 3.2 | 3.2 x 32 | Steel 4.6 / A2 | ISO 2341 |
| 12 | 40 | 20 | 5.5 | 3.2 | 3.2 x 36 | Steel 4.6 | ISO 2341 |
| 16 | 50 | 27 | 7.0 | 4.0 | 4 x 40 | Steel 4.6 | ISO 2341 |
