Product Description
5/16" UNC A2 Stainless Steel Socket Cap Bolts with Shank
These 5/16" UNC socket cap bolts are manufactured from corrosion-resistant A2 stainless steel and feature a partially threaded shank. Their cylindrical head and internal hexagon drive provide a strong, compact fastening solution for engineering, machinery, automotive, maintenance and general assembly applications.
The bolts have a 5/16"-18 UNC thread, meaning the nominal thread diameter is 5/16" with 18 threads per inch. Their principal inch-series dimensions correspond to ASME B18.3 hexagon socket head cap screw requirements.
The part-threaded design provides a plain bearing section through the assembled components. Installation requires a 1/4" AF hexagon or Allen key.
Key Features
- 5/16" nominal thread diameter
- UNC unified coarse thread
- 18 threads per inch
- A2 stainless steel construction
- Good resistance to corrosion and moisture
- Part-threaded design with an unthreaded shank
- Cylindrical socket cap head
- 1/4" AF internal hexagon drive
- ASME B18.3 dimensional pattern
- Available in 1 3/4", 2" and 3" lengths
- Multiple pack quantities available
Product Specifications
- Thread size: 5/16"-18 UNC
- Threads per inch: 18 TPI
- Material: A2 stainless steel
- Head style: Cylindrical socket cap
- Drive type: Internal hexagon
- Hex key size: 1/4" AF
- Head diameter: 0.457–0.469"
- Head height: 0.306–0.312"
- Minimum socket engagement: 0.151"
- Thread coverage: Part threaded with shank
- Dimensional standard: ASME B18.3
- British thread standard: BS 1580-1
Please note: The thread length shown is the minimum standard value. Actual thread and plain shank lengths may vary slightly according to the manufacturer or production batch. Please contact us before ordering if either dimension is critical.
Related Products and Information
- 3/8" UNC A2 stainless socket cap bolts with shank
- Browse all socket cap screws
- UNC, UNF and metric thread data guide
- A2 versus A4 stainless steel guide
| A | B | C | D | E | F | G |
| 5/16" | * | 1.38 | 0.45 | 0.30 | 1/4" | 18 |
| 5/16" | 2" | 1.38 | 0.45 | 0.30 | 1/4" | 18 |
| 5/16" | 3" | 1.16 | 0.45 | 0.30 | 1/4" | 18 |
Please Note: Specifications given are intended as a guide only. If critical to your project please check with us first.
