Product Description
5/16" UNF 12.9 Grade Self Colour Countersunk Socket Screws
5/16" UNF countersunk socket screws in 12.9 grade high tensile steel with a self colour, unplated finish. The fine thread has 24 threads per inch, and the internal hexagon socket accepts a 3/16" Allen key.
The flat countersunk head sits flush in a correctly prepared countersink. Choose the required screw length and pack quantity from the available options.
Technical Specifications
| Thread Size | 5/16" UNF |
|---|---|
| Thread Type | Unified National Fine |
| Threads Per Inch | 24 TPI |
| Material | High tensile steel |
| Grade | 12.9 |
| Finish | Self colour, unplated |
| Head Style | Flat countersunk |
| Drive Type | Hexagon socket |
| Allen Key Size | 3/16" |
| Maximum Head Diameter | 0.656" |
| Maximum Head Height | 0.198" |
| Dimensional Reference | ASME B18.3 |
Available Lengths
1/2", 1", 1 1/4", 1 1/2" and 1 3/4".
Measuring and Fitting
Countersunk screw length is measured overall, including the head. Match the screw to a 5/16" UNF nut or tapped hole with 24 TPI, and check that the countersink suits the screw head.
The self colour finish has no protective plating. Consider suitable corrosion protection where the screws will be exposed to moisture.
