Product Description
5/16" UNF Grade 8 Hex Head Bolts – Yellow Zinc Plated
These 5/16" UNF Grade 8 hex head bolts are made from high tensile steel and finished with yellow zinc plating. The part threaded shank has an unthreaded section below the head, while the external hex head is tightened using a 1/2" spanner or socket.
Each bolt has a 5/16"-24 UNF fine thread, equivalent to 24 threads per inch. Select the required imperial length from the product options. Bolt length is measured from the underside of the head to the tip.
Key Features
- SAE Grade 8 strength: for applications specifying this high tensile imperial grade.
- Yellow zinc plated steel: offers a bright finish and helps protect against corrosion.
- UNF fine thread: 5/16" nominal diameter with 24 threads per inch.
- Part threaded shank: provides an unthreaded bearing section beneath the head.
- Hexagon head: suitable for tightening with a 1/2" spanner or socket.
- Imperial length selection: choose the required length from the product options.
Technical Specifications
| Specification | Details |
|---|---|
| Product type | Hexagon head bolt with shank |
| Material | High tensile steel |
| Strength grade | SAE Grade 8 |
| Finish | Yellow zinc plated |
| Thread size | 5/16"-24 UNF |
| Threads per inch | 24 TPI |
| Thread pitch equivalent | Approximately 1.058 mm |
| Nominal thread diameter | 5/16" / 7.94 mm |
| Thread coverage | Part threaded |
| Head style | External hexagon |
| Spanner or socket size | 1/2" across flats |
| Length measurement | Underside of head to tip |
Applications
Suitable for machinery, equipment assembly, vehicle maintenance and engineering work where a 5/16"-24 UNF Grade 8 part threaded bolt is specified. Check the required bolt length, thread engagement and joint specification before fitting.
Choosing a Matching Nut
For an assembly using a separate nut, choose a 5/16"-24 UNF nut with a compatible strength rating. Browse our range of nuts or consult the thread data guide to check imperial thread sizes and pitches.
