(-)Flat head machine screw(Coarse Steel Unplated 4 X 25 Pitch 0.7
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 diameter (d): M4
- Length under head (ℓ): 25.0
- Pitch (P): 0.7
- Head diameter (dk): Nominal 7.0, Tolerance 0, -0.5
- Head height (k): Nominal 2.6, Tolerance ±0.15
- Slot width (n): Reference 1.0
- Slot depth (t): Reference 1.4
(-)Flat head machine screw(Coarse Steel Unplated 4 X 25 Pitch 0.7
| Steel | Unplated | 4 X 25 | Individual sale | View Details |
|---|
(-)Flat head machine screw(Coarse Steel Unplated 4 X 25 Pitch 0.7 - Surface Finish Variants
| Material | Surface Treatment | Size | Individual Sale | View Details |
|---|---|---|---|---|
| Steel | Zinc plated(Silver) | 4 X 25 | Individual sale | View Details |
| Steel | Trivalent white(Silver) | 4 X 25 | Individual sale | View Details |
| Steel | Nickel(Silver) | 4 X 25 | Individual sale | View Details |

