For quick-release pins, push-button in A2 Stainless Steel, the controlling selection factors are corrosion exposure, strength requirement and service temperature. The grade data for A2 Stainless Steel (ISO 3506 group A2 (304 / 1.4301), commonly supplied A2-70) is summarized below together with every size supplied.
Why Choose A2 Stainless Steel for Quick-Release Pins, Push-Button
The most common stainless group for indoor and general outdoor fasteners. For quick-release pins, push-button, 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 Quick-Release Pins, Push-Button in indoor and general outdoor service. In chloride-bearing environments (marine air, road salt, swimming pools) consider stepping up to A4 (316).
Galvanic & Galling Considerations
For stainless quick-release pins, push-button 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.
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 Quick-Release Pins, Push-Button Available in A2 Stainless Steel
| Shank diameter d (mm) | Usable length (mm) | Head diameter (mm) | Double shear load (kN) | Operation | Material | Finish | Head profile |
|---|---|---|---|---|---|---|---|
| 4 | 15 | 11 | 3.5 | Push button | Stainless 1.4305 | Passivated | Low button |
| 5 | 20 | 13 | 5.5 | Push button | Stainless 1.4305 | Passivated | Low button |
| 6 | 25 | 16 | 8.0 | Push button | Stainless 1.4305 | Passivated | Low button |
| 8 | 35 | 20 | 14.5 | Push button | Stainless 1.4305 | Passivated | Low button |
| 10 | 45 | 24 | 23.0 | Push button | Stainless 1.4305 | Passivated | Low button |
