A2 Stainless Steel Nylon Flat Washers are supplied to DIN 125 A. 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 Nylon Flat Washers
The most common stainless group for indoor and general outdoor fasteners. For nylon flat washers, 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 Nylon Flat Washers 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
Two important notes for stainless nylon flat washers: (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.
Using Stainless Fasteners in Aluminum
The galvanic couple here runs the wrong way: aluminum is the less noble metal, so it corrodes and the fastener does not. What governs the rate is the ratio of areas — a large anode and a small cathode is a tolerable combination, the reverse concentrates the attack into thin material around the hole. An isolating washer plus sealant breaks the circuit; where that is impractical, match the fastener to the substrate.
Sizes of Nylon Flat Washers Available in A2 Stainless Steel
| Thread size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness s (mm) | Temperature range (deg C) | Reference standard |
|---|---|---|---|---|---|
| M2 | 2.2 | 5 | 0.3 | -40 to +100 | DIN 125 A series |
| M2.5 | 2.7 | 6 | 0.5 | -40 to +100 | DIN 125 A series |
| M3 | 3.2 | 7 | 0.5 | -40 to +100 | DIN 125 A series |
| M4 | 4.3 | 9 | 0.8 | -40 to +100 | DIN 125 A series |
| M5 | 5.3 | 10 | 1.0 | -40 to +100 | DIN 125 A series |
| M6 | 6.4 | 12 | 1.6 | -40 to +100 | DIN 125 A series |
| M8 | 8.4 | 16 | 1.6 | -40 to +100 | DIN 125 A series |
| M10 | 10.5 | 20 | 2.0 | -40 to +100 | DIN 125 A series |
| M12 | 13 | 24 | 2.5 | -40 to +100 | DIN 125 A series |
| M16 | 17 | 30 | 3.0 | -40 to +100 | DIN 125 A series |
| M20 | 21 | 37 | 3.0 | -40 to +100 | DIN 125 A series |
Dimensions are independent of the material: the table above lists the sizes supplied, and on this page every one of them is quoted in A2 Stainless Steel. The catalogue's default material column has been omitted here so it cannot be read as contradicting that.
Custom manufacturing · Made to drawing
Need this washer in a grade that is not listed?
A2 Stainless Steel is one of the grades the catalog describes. Bore and outside diameter are set by the joint rather than by the bolt, which is why an off-table size is so often the right answer. Made by stamping or punching.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
