8Mark bolt(Small(Full thread(Coarse Steel Trivalent white(Silver) 8 X 20 Pitch 1.25
※For countersunk screws, the total length including the head is the nominal length.
■Differences between SUS410 and stainless steel (XM7, 304).
SUS410 is hardened by quenching, making it a commonly used material for general-purpose drill screws.
On the other hand, it has lower corrosion resistance and stronger magnetic properties.
SUS304 is one of the most widely used grades among stainless steels, particularly as a heat-resistant steel.
It is known for its excellent corrosion resistance, weldability, and mechanical properties.
Product Details

- 8 Mark bolt, Small, Full thread, Coarse pitch
- Nominal diameter (d): M8
- Length under head (ℓ): 20.0
- Pitch: 1.25
- Head height (k): Nominal 5.5, Tolerance ±0.25
- Width across flats (s): Nominal 12, Tolerance 0,-0.7
- Width across corners (e): Approx. 13.9
8Mark bolt(Small(Full thread(Coarse Steel Trivalent white(Silver) 8 X 20 Pitch 1.25
| Steel | Trivalent white(Silver) | 8 X 20 | Individual sale | View Details |
|---|
8Mark bolt(Small(Full thread(Coarse Steel Trivalent white(Silver) 8 X 20 Pitch 1.25 - Surface Finish Variants
| Material | Surface Treatment | Size | Individual Sale | View Details |
|---|---|---|---|---|
| Steel | Unplated | 8 X 20 | Individual sale | View Details |
| Steel | Zinc plated(Silver) | 8 X 20 | Individual sale | View Details |
| Steel | Chromate(Ochre) | 8 X 20 | Individual sale | View Details |

