Product Description
UNF Grade 8 Hexagon Full Nuts – High Tensile Steel, Yellow Zinc Plated
These UNF Grade 8 hexagon full nuts are manufactured from high tensile steel with a yellow zinc plated finish. They feature Unified National Fine threads for use with matching imperial fine-thread bolts, set screws and studs.
Manufactured to SAE J995 Grade 8 with hexagon nut dimensions to ASME B18.2.2, they are suitable for assemblies requiring compatible high-strength nuts. Available in eight thread sizes from 1/4 inch to 3/4 inch.
Key Features
- SAE Grade 8: High-strength steel nuts for demanding mechanical fastening applications.
- UNF fine threads: For matching imperial fine-thread bolts and studs.
- Full nut pattern: Standard full-height hexagon body.
- Yellow zinc plated finish: Provides additional corrosion protection compared with unplated steel.
- Hexagon shape: For installation and removal with a suitable spanner or socket.
- Eight available sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8" and 3/4".
Technical Specifications
| Product Type | Plain hexagon full nut |
|---|---|
| Material | High tensile steel |
| Strength Grade | SAE Grade 8 |
| Mechanical Standard | SAE J995 Grade 8 |
| Dimensional Standard | ASME B18.2.2 |
| Finish | Yellow zinc plated |
| Thread Type | Unified National Fine |
| Nut Pattern | Full-height hexagon |
| Locking Feature | Plain nut without a self-locking insert or prevailing-torque feature |
Available Sizes, Threads and Spanner Sizes
| Thread Size | Threads Per Inch | Spanner / Socket Size |
|---|---|---|
| 1/4" UNF | 28 TPI | 7/16" |
| 5/16" UNF | 24 TPI | 1/2" |
| 3/8" UNF | 24 TPI | 9/16" |
| 7/16" UNF | 20 TPI | 11/16" |
| 1/2" UNF | 20 TPI | 3/4" |
| 9/16" UNF | 18 TPI | 7/8" |
| 5/8" UNF | 18 TPI | 15/16" |
| 3/4" UNF | 16 TPI | 1 1/8" |
Nut Height Dimensions
| Thread Size | Minimum Height | Maximum Height |
|---|---|---|
| 1/4" UNF | 0.212" | 0.226" |
| 5/16" UNF | 0.258" | 0.273" |
| 3/8" UNF | 0.320" | 0.377" |
| 7/16" UNF | 0.365" | 0.385" |
| 1/2" UNF | 0.427" | 0.448" |
| 9/16" UNF | 0.473" | 0.496" |
| 5/8" UNF | 0.535" | 0.559" |
| 3/4" UNF | 0.617" | 0.665" |
Typical Applications
- Machinery and equipment assembly.
- Vehicle repairs requiring UNF high-strength fasteners.
- Securing brackets, housings and mechanical components.
- Maintenance and replacement of matching imperial fine-thread nuts.
Selecting Your Nuts
The sizes listed refer to the internal thread diameter, not the spanner size. Match both the diameter and threads per inch to the bolt or stud being used.
Choose compatible bolt and nut grades, and follow the tightening requirements for your assembly. Select your required thread size and pack quantity from the available options.
For matching 3/8" fasteners, see our 3/8" UNF Grade 8 yellow zinc hexagon bolts. Visit our thread data guide for help checking imperial thread sizes and pitches.
