A2 Stainless Steel Cheese Head Screws combine the dimensional form of ISO 7048 / DIN 7985 with the material properties of grade A2-70 (304): good general corrosion resistance, largely non-magnetic, service range approx. -200 °C to +400 °C. This page summarizes the grade data, its corrosion behavior in service, the comparable grades, and the sizes supplied.
Why Choose A2 Stainless Steel for Cheese Head Screws
The most common stainless grade for indoor and general outdoor fasteners. For cheese head 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 |
Galvanic & Galling Considerations
Two important notes for stainless cheese 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.
Comparable Grades
For Cheese Head Screws, the alternative stainless grade is A4 (316). A2 (304) suits general indoor and outdoor service; A4 (316) adds molybdenum for marine and chloride environments. Where higher strength matters more than corrosion, switch to plated alloy-steel class 8.8 or 10.9.
Sizes of Cheese Head Screws Available in A2 Stainless Steel
| Size | Pitch (mm) | Head diameter dk (mm) | Head height k (mm) | Cross recess | Reference standard |
|---|---|---|---|---|---|
| M1.6 | 0.35 | 3.0 | 1.6 | PH0 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M2 | 0.4 | 3.8 | 2.0 | PH1 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M2.5 | 0.45 | 5.0 | 2.5 | PH1 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M3 | 0.5 | 5.5 | 3.0 | PH1 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M3.5 | 0.6 | 6.0 | 3.5 | PH2 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M4 | 0.7 | 7.0 | 4.0 | PH2 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M5 | 0.8 | 8.5 | 5.0 | PH2 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M6 | 1.0 | 10.0 | 6.0 | PH3 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M8 | 1.25 | 13.0 | 8.0 | PH3 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |
| M10 | 1.5 | 16.0 | 10.0 | PH4 | ISO 7048 / DIN 7985 (cross) / ISO 1207 (slotted) |