Product Description
1/4" BSW Countersunk Part Thread Socket Bolts – BS 2470
High grade alloy steel countersunk socket bolts with a 1/4"-20 BSW Whitworth thread and a black self-colour finish. These part-threaded fasteners feature a plain shank and an internal hexagon drive for tightening with a 5/32" Allen key or hex bit.
Product Specifications
| Material | High grade alloy steel |
|---|---|
| Finish | Black self colour, unplated |
| Standard | BS 2470 |
| Thread Type | BSW – British Standard Whitworth |
| Thread Size | 1/4"-20 BSW |
| Threads Per Inch | 20 TPI |
| Nominal Thread Diameter | 1/4" / 6.35mm |
| Thread Coverage | Part threaded |
| Head Style | Countersunk |
| Drive Type | Internal hexagon |
| Allen Key Size | 5/32" |
Available Lengths
| Overall Length | Metric Equivalent |
|---|---|
| 1 1/2" | 38.1mm |
| 1 3/4" | 44.45mm |
| 2" | 50.8mm |
Head Dimensions
| Maximum Theoretical Sharp-Corner Head Diameter | 0.475" / approximately 12.07mm |
|---|---|
| Minimum Head Diameter | 0.432" / approximately 10.97mm |
| Reference Head Height | 0.112" / approximately 2.84mm |
Key Features
- Alloy steel construction.
- Plain shank for assemblies requiring a part-threaded fastener.
- Countersunk head allows a flush finish in a correctly prepared countersink.
- BSW thread for matching Whitworth nuts and tapped holes.
Length is measured overall, including the countersunk head. Select your required length and pack quantity before ordering.
Standard
BS 2470 – hexagon socket screws.
