Product Description
5/16" BSW Whitworth Unplated Steel Hexagon Head Set Screws
These 5/16" BSW hexagon head set screws are manufactured from high tensile steel with an unplated self colour finish. They feature an 18 TPI British Standard Whitworth thread for use with matching BSW nuts or tapped holes.
The fully threaded design provides thread engagement along the shank, while the hexagon head allows tightening with a correctly fitting spanner or socket. These imperial fixings are useful for maintenance, restoration and engineering work on assemblies using Whitworth threads.
Key Features
- 5/16" BSW thread: British Standard Whitworth thread with 18 threads per inch.
- High tensile steel: for applications specifying high tensile steel fixings.
- Fully threaded: set screw design for use with matching nuts or tapped holes.
- Hexagon head: suitable for spanner or socket installation.
- Self colour finish: unplated steel with a dark appearance.
- Choice of lengths: select the length and pack size required for your assembly.
Product Specifications
| Thread Size | 5/16" BSW |
|---|---|
| Nominal Thread Diameter | 0.3125" / approximately 7.94mm |
| Threads Per Inch | 18 TPI |
| Thread Type | British Standard Whitworth |
| Material | High tensile steel grade R |
| Finish | Unplated / self colour |
| Head Style | Hexagon |
| Thread Coverage | Fully threaded |
| Length Measurement | Measured from beneath the head to the end of the screw |
Typical Applications
- Maintenance and repair of machinery using BSW threads.
- Classic vehicle and equipment restoration.
- Brackets, housings and general engineering assemblies.
- Replacement of matching imperial hexagon set screws.
Choosing and Fitting Your Set Screws
Check that the mating nut or tapped hole is 5/16" BSW with 18 TPI. Select a length that allows sufficient thread engagement without bottoming out in a blind hole.
Measure the required length from beneath the hexagon head. Use a spanner or socket that fits the head closely and tighten to the requirements of the assembly.
The unplated steel finish does not provide a plated corrosion barrier. Apply suitable corrosion protection where the fixings will be exposed to moisture.
Select your required length and pack quantity from the available options.
For help identifying imperial threads, see our thread data guide. Browse our bolts and set screws for other sizes and styles.
