A2 Stainless Steel Wood Screws are stocked to DIN 96 / DIN 97 / DIN 7997. The grade provides good general corrosion resistance and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C. Property data, grade comparison and the full size table follow.
Why Choose A2 Stainless Steel for Wood Screws
The most common stainless grade for indoor and general outdoor fasteners. For wood screws, this matters when good general corrosion resistance is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A2-70 (304) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| 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 Wood Screws 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 wood screws: (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.
Sizes of Wood Screws Available in A2 Stainless Steel
| Nominal diameter (mm) | Head diameter dk (mm) | Head height k (mm) | Head type | Pilot hole (mm) | Common length range (mm) | Reference standard | Notes |
|---|---|---|---|---|---|---|---|
| 2.0 | 3.8 | 1.2 | Countersunk | 1.2 | 10~25 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 2.5 | 4.7 | 1.5 | Countersunk | 1.5 | 12~30 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 3.0 | 5.6 | 1.65 | Countersunk | 1.8 | 12~40 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 3.5 | 6.5 | 1.93 | Countersunk | 2.0 | 16~50 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 4.0 | 7.5 | 2.2 | Countersunk | 2.3 | 16~70 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 4.5 | 8.5 | 2.5 | Countersunk | 2.5 | 20~80 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 5.0 | 9.2 | 2.5 | Countersunk | 3.0 | 20~100 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 6.0 | 11.0 | 3.0 | Countersunk | 3.5 | 30~120 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |
| 8.0 | 14.5 | 4.0 | Countersunk | 5.0 | 40~160 | DIN 97 / DIN 7997 | Slotted/cross wood screw, gimlet point |