A4 Stainless Steel Pan Head Screws are stocked to ISO 1207 / ISO 7045 / DIN 7985. The grade provides superior, including marine and chloride environments 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 A4 Stainless Steel for Pan Head Screws
Specified for marine, coastal and chemical applications. For pan head screws, this matters when superior, including marine and chloride environments is the primary requirement.
Mechanical & Physical Properties
| Grade designation | A4-80 (316) |
|---|---|
| Magnetic response | Largely non-magnetic |
| Service temperature | approx. -200 °C to +400 °C |
| Corrosion characteristic | Superior, including marine and chloride environments |
Corrosion Behavior in Service
A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Pan Head Screws in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.
Galvanic & Galling Considerations
Two important notes for stainless pan head 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 Pan Head Screws Available in A4 Stainless Steel
| Size | Pitch (mm) | Head diameter dk (mm) | Head height k (mm) | Cross recess | Reference standard |
|---|---|---|---|---|---|
| M1 | 0.25 | 2.0 | 0.8 | PH0 | ISO 1207 / ISO 7045 / DIN 7985 |
| M1.2 | 0.25 | 2.3 | 0.9 | PH0 | ISO 1207 / ISO 7045 / DIN 7985 |
| M1.4 | 0.3 | 2.6 | 1.0 | PH0 | ISO 1207 / ISO 7045 / DIN 7985 |
| M1.6 | 0.35 | 3.0 | 1.0 | PH0 | ISO 1207 / ISO 7045 / DIN 7985 |
| M2 | 0.4 | 3.8 | 1.3 | PH1 | ISO 1207 / ISO 7045 / DIN 7985 |
| M2.5 | 0.45 | 4.7 | 1.5 | PH1 | ISO 1207 / ISO 7045 / DIN 7985 |
| M3 | 0.5 | 5.6 | 1.8 | PH1 | ISO 1207 / ISO 7045 / DIN 7985 |
| M3.5 | 0.6 | 6.5 | 2.1 | PH2 | ISO 1207 / ISO 7045 / DIN 7985 |
| M4 | 0.7 | 8.0 | 2.4 | PH2 | ISO 1207 / ISO 7045 / DIN 7985 |
| M5 | 0.8 | 9.5 | 3.0 | PH2 | ISO 1207 / ISO 7045 / DIN 7985 |
| M6 | 1.0 | 12.0 | 3.6 | PH3 | ISO 1207 / ISO 7045 / DIN 7985 |
| M8 | 1.25 | 16.0 | 4.8 | PH3 | ISO 1207 / ISO 7045 / DIN 7985 |
| M10 | 1.5 | 20.0 | 6.0 | PH4 | ISO 1207 / ISO 7045 / DIN 7985 |