A2 Stainless Steel Quick-Release Pin Retaining Caps are supplied to Trade series (quick-release pin retaining caps). The grade provides good general corrosion resistance and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint. Property data, grade comparison and the full size table follow.
Why Choose A2 Stainless Steel for Quick-Release Pin Retaining Caps
The most common stainless group for indoor and general outdoor fasteners. For quick-release pin retaining caps, 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 Pin Retaining Caps 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 pin retaining caps 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
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 Quick-Release Pin Retaining Caps Available in A2 Stainless Steel
| Pin diameter | Cap OD | Overall length | Usable reduction | Material | Option |
|---|---|---|---|---|---|
| 3/16 in | 3/8 in | 9/16 in | 1/8 in | 18-8 stainless steel | optional lanyard screw |
| 1/4 in | 3/8 in | 9/16 in | 1/8 in | 18-8 stainless steel | optional lanyard screw |
| 5/16 in | 1/2 in | 5/8 in | 1/8 in | 18-8 stainless steel | optional lanyard screw |
| 3/8 in | 9/16 in | 3/4 in | 3/16 in | 18-8 stainless steel | optional lanyard screw |
| 1/2 in | 3/4 in | 1 in | 1/4 in | 18-8 stainless steel | optional lanyard screw |
| 5/8 in | 1 in | 1-1/4 in | 1/4 in | 18-8 stainless steel | optional lanyard screw |
| 6 / 8 / 10 / 12 / 16 mm | 9.5 / 12.7 / 14.3 / 19.1 / 25.4 | 14.7 / 15.9 / 18.5 / 25.4 / 31.8 | 3 / 3 / 5 / 6 / 6 mm | 18-8 stainless steel | optional lanyard screw |
