Product Description
1/4" UNC A2 stainless steel countersunk socket set screws, manufactured for imperial UNC threaded fastening applications. These countersunk socket screws are made from A2 stainless steel, giving good corrosion resistance for general indoor, outdoor and damp applications.
The countersunk head is designed to sit flush into a countersunk hole, giving a neat low-profile finish. The hex socket / Allen key drive provides good tool engagement and allows secure installation where a flush socket fixing is required.
These 1/4" UNC countersunk socket screws have a 20 TPI Unified National Coarse thread and are available in imperial lengths from 1/2" to 2". For imperial socket countersunk screws, the suitable standard reference is ASME B18.3, with ASME B1.1 covering the UNC thread form.
- 1/4" UNC countersunk socket screws
- A2 stainless steel
- Countersunk head for flush fitting
- Hex socket / Allen key drive
- UNC / Unified National Coarse thread
- 20 TPI
- ASME B18.3 / ASME B1.1 style
- Lengths from 1/2" to 2"
- Available in small and bulk pack sizes
Also known as UNC countersunk socket screws, stainless Allen countersunk screws, flat head socket screws, imperial socket screws, 1/4" UNC socket screws and A2 stainless countersunk Allen screws.

| A | B | C | D | E | F |
| 1/4" | 1 1/2" | * | * | * | 20 |
| 1/4" | 1 1/4" | * | * | * | 20 |
| 1/4" | 1" | * | * | * | 20 |
| 1/4" | 1/2" | * | * | * | 20 |
| 1/4" | 2" | * | * | * | 20 |
| 1/4" | 3/4" | * | * | * | 20 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.