Product Description
½"-20 UNF A2 Stainless Steel Socket Cap Head Bolts
A2 stainless steel socket cap head bolts with a ½"-20 UNF fine thread and internal hexagon drive. The cylindrical cap head is installed using a ⅜" Allen key, making these bolts suitable for assemblies where access around an external hexagon head is restricted.
Available in 1½", 2½" and 3" lengths for machinery, equipment maintenance and general engineering applications requiring an imperial fine thread and stainless steel corrosion resistance.
Specifications
| Feature | Specification |
|---|---|
| Fastener type | Socket cap head bolt / socket cap screw |
| Material | A2 stainless steel |
| Dimensional standard | ASME B18.3 |
| Thread system | UNF – Unified National Fine |
| Thread size | ½"-20 UNF |
| Nominal thread diameter | ½" (12.7mm) |
| Thread pitch | 20 threads per inch |
| Head style | Cylindrical socket cap head |
| Maximum head diameter | 0.750" (19.05mm) |
| Maximum head height | 0.500" (12.7mm) |
| Allen key size | ⅜" |
| Length measurement | Measured from beneath the head to the end of the bolt |
Available Lengths
| Imperial Length | Metric Conversion |
|---|---|
| 1½" | 38.1mm |
| 2½" | 63.5mm |
| 3" | 76.2mm |
Metric length values are conversions of the nominal imperial measurements.
Key Features
- A2 stainless steel construction for corrosion resistance.
- ½"-20 UNF fine thread for matching nuts and tapped holes.
- Internal hexagon socket for installation with a ⅜" Allen key.
- ASME B18.3 socket cap head dimensions.
- Three lengths with a choice of pack quantities.
Typical Applications
Suitable for machinery assemblies, brackets, equipment repairs and maintenance projects requiring ½"-20 UNF socket cap fixings.
Ordering
Select the required length and a pack quantity of 1, 5, 10, 20, 50 or 100 before adding to your basket. Check thread engagement and head clearance against your assembly.
