Product Description
3/8" UNF Grade 8 Hex Head Set Screws – Yellow Zinc Plated
These 3/8" UNF Grade 8 hex head set screws combine high tensile steel with a yellow zinc plated finish. The fully threaded design suits assemblies using matching nuts or tapped holes, while the hexagon head accepts a standard 9/16" spanner or socket.
Each screw has a 3/8"-24 UNF fine thread, with 24 threads per inch. Choose from four imperial lengths: 7/8", 1", 1 1/8" and 1 1/4", with a choice of pack quantities.
Key Features
- SAE Grade 8 high tensile steel: for applications specifying this imperial strength grade.
- Fully threaded: provides thread engagement along the screw shank.
- UNF fine thread: 3/8" nominal diameter with 24 threads per inch.
- Yellow zinc plated finish: helps protect the steel against corrosion.
- Hexagon head: fits a 9/16" spanner or socket.
- Four length options: select the length and pack size required for your assembly.
Technical Specifications
| Specification | Details |
|---|---|
| Product type | Fully threaded hexagon head set screw |
| Material | High tensile steel |
| Strength grade | SAE J429 Grade 8 |
| Finish | Yellow zinc plated |
| Thread designation | 3/8"-24 UNF |
| Nominal thread diameter | 3/8" / 9.525 mm |
| Thread type | Unified National Fine |
| Threads per inch | 24 TPI |
| Thread pitch equivalent | Approximately 1.058 mm |
| Thread coverage | Fully threaded |
| Head style | External hexagon |
| Spanner / socket size | 9/16" across flats |
| Length measurement | From the underside of the head to the tip |
Available Lengths
| Thread Size | Length Under Head | Metric Equivalent | Thread Coverage |
|---|---|---|---|
| 3/8"-24 UNF | 7/8" | 22.23 mm | Fully threaded |
| 3/8"-24 UNF | 1" | 25.40 mm | Fully threaded |
| 3/8"-24 UNF | 1 1/8" | 28.58 mm | Fully threaded |
| 3/8"-24 UNF | 1 1/4" | 31.75 mm | Fully threaded |
Metric length equivalents are rounded to two decimal places. Order by the imperial size shown in the product options.
Applications
Suitable for machinery maintenance, equipment assembly, brackets, housings and vehicle restoration where a 3/8"-24 UNF Grade 8 fully threaded fastener is specified. Select the length to suit the joint thickness and required thread engagement.
Choosing Matching Nuts
For assemblies using a separate nut, choose the 3/8" UNF option from our Grade 8 yellow zinc hexagon full nuts. Match both the thread diameter and the 24 TPI pitch, and follow the equipment manufacturer's tightening specification.
For a partially threaded alternative, see our 3/8" UNF Grade 8 yellow zinc hex head bolts. For help identifying thread sizes, visit our thread data guide.
