Product Description
5/16" UNC self colour steel hex head fully threaded set screws for imperial coarse thread fastening applications. These hex set screws have a plain / self colour finish and are suitable for engineering, machinery, automotive, repair, maintenance and restoration work where a Unified National Coarse thread is required.
The hexagon head allows tightening with a spanner or socket, making these set screws a practical choice for general assembly and mechanical fastening. The fully threaded shank provides thread engagement along the full length of the fixing.
These 5/16" UNC hex head set screws have an 18 TPI Unified National Coarse thread and are available in lengths from 1/2" to 3". For imperial hex head screws, the suitable dimensional reference is ASME B18.2.1, with ASME B1.1 covering the UNC thread form.
- 5/16" UNC hex head set screws
- Self colour / plain steel finish
- Fully threaded
- Hexagon head for spanner or socket tightening
- UNC / Unified National Coarse thread
- 18 TPI
- ASME B18.2.1 / ASME B1.1 style
- Lengths from 1/2" to 3"
- Available in small and bulk pack sizes
Also known as UNC set screws, imperial hex set screws, 5/16" UNC bolts, fully threaded hex screws, self colour hex bolts and 5/16" UNC hex head screws.

| A | B | C | D | E |
| 5/16" | 3" | 1/2" | 7/32" | 18 |
| 5/16" | 1/2" | 1/2" | 7/32" | 18 |
| 5/16" | 5/8" | 1/2" | 7/32" | 18 |
| 5/16" | 3/4" | 1/2" | 7/32" | 18 |
| 5/16" | 1" | 1/2" | 7/32" | 18 |
| 5/16" | 1 1/4" | 1/2" | 7/32" | 18 |
| 5/16" | 1 1/2" | 1/2" | 7/32" | 18 |
| 5/16" | 2" | 1/2" | 7/32" | 18 |
| 5/16" | 2 1/2" | 1/2" | 7/32" | 18 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.