(-)Flat head machine screw(Coarse Steel Unplated 8 X 20 Pitch 1.25
The head of a round machine screw is nearly hemispherical in shape, similar to today's truss head machine screw. The flat head machine screw has a low-profile cylindrical head. It was commonly manufactured in the past due to its simple production method.
Machine Screw Head Dimensions List Encyclopedia of Round & Flat Head Machine Screws
Machine Screw Head Dimensions List Encyclopedia of Round & Flat Head Machine Screws
Product Details

- Slotted (-) flat head machine screw, coarse pitch
- Nominal thread diameter (d): M8
- Length under head (ℓ): 20.0
- Pitch (P): 1.25
- Head diameter (dk): Nominal 14.0, Tolerance 0,-0.8
- Head height (k): Nominal 5.2, Tolerance +0.2
- Slot width (n): Reference 1.6
- Slot depth (t): Reference 2.8
(-)Flat head machine screw(Coarse Steel Unplated 8 X 20 Pitch 1.25
| Steel | Unplated | 8 X 20 | Individual sale | View Details |
|---|
(-)Flat head machine screw(Coarse Steel Unplated 8 X 20 Pitch 1.25 - Surface Finish Variants
| Material | Surface Treatment | Size | 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 |
| Steel | Trivalent white(Silver) | 8 X 20 | Individual sale | View Details |
| Steel | Trivalent black(Black) | 8 X 20 | Individual sale | View Details |
| Steel | BC(Black) | 8 X 20 | Individual sale | View Details |

