Product Description
5/16" UNF A2 Stainless Steel Cup Point Socket Allen Key Grub Screws
These 5/16" UNF cup point grub screws are manufactured from A2 stainless steel and feature an internal hexagon socket for tightening with a 5/32" Allen key. Their headless design allows them to sit flush with or below the surface of a suitably threaded component.
The recessed cup point provides a circular contact edge that grips the mating surface when tightened. These screws are commonly used to secure collars, pulleys, knobs and other components onto shafts. A2 stainless steel provides corrosion resistance for many general engineering applications.
Technical Specifications
| Thread Size | 5/16" UNF |
|---|---|
| Nominal Thread Diameter | 5/16" — approximately 7.94 mm |
| Threads Per Inch | 24 TPI |
| Thread Pitch | Approximately 1.058 mm |
| Thread Form | Unified National Fine |
| Material | A2 stainless steel |
| Screw Style | Headless socket set screw |
| Point Style | Cup point |
| Drive Type | Internal hexagon socket |
| Allen Key Size | 5/32" — approximately 3.97 mm |
| Dimensional Reference | ASME B18.3 |
Available Lengths
Grub screw length is measured over the full length of the screw, including the point. Metric equivalents are provided for reference.
| Imperial Length | Metric Equivalent |
|---|---|
| 3/8" | 9.53 mm |
| 1/2" | 12.70 mm |
| 3/4" | 19.05 mm |
| 1" | 25.40 mm |
Selecting Your Grub Screw
Select the required length and pack size from the available options. Use with a matching 5/16"-24 UNF tapped hole and a correctly fitting 5/32" imperial Allen key.
Check the thread before ordering, as 5/16" UNF and 5/16" UNC have different pitches. The cup point can mark the mating surface as it grips, so consider this when choosing a screw for finished shafts or components.
Please note: Dimensions are provided as a guide. If precise dimensions or confirmed compliance with a particular standard are essential for your application, please contact us before ordering.
Browse Related Categories
| A | B | C | D |
| 5/16" | 3/8" | 5/32" | 24 |
| 5/16" | 1/2" | 5/32" | 24 |
| 5/16" | 3/4" | 5/32" | 24 |
| 5/16" | 1" | 5/32" | 24 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.
