Product Description
1/4" UNF 12.9 Grade Zinc Plated Countersunk Socket Screws
1/4" UNF countersunk socket screws in 12.9 grade high tensile steel with a zinc plated finish. The fine thread has 28 threads per inch, and the internal hexagon socket accepts a 5/32" 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 | 1/4" UNF |
|---|---|
| Thread Type | Unified National Fine |
| Threads Per Inch | 28 TPI |
| Material | High tensile steel |
| Grade | 12.9 |
| Finish | Zinc plated |
| Head Style | Flat countersunk |
| Drive Type | Hexagon socket |
| Allen Key Size | 5/32" |
| Maximum Head Diameter | 0.531" |
| Maximum Head Height | 0.161" |
| Dimensional Reference | ASME B18.3 |
Available Lengths
1/2" and 5/8".
Measuring and Fitting
Countersunk screw length is measured overall, including the head. Match the screw to a 1/4" UNF nut or tapped hole with 28 TPI, and check that the countersink suits the screw head.
