Product Description
UNC Serrated Large Flange Nuts – Zinc Plated Case-Hardened Steel
These UNC serrated flange nuts combine a hexagon nut with an integral large flange. The flange spreads the clamping force over a wider bearing area, while serrations on its underside grip the mating surface to help resist rotation.
Manufactured from case-hardened steel with a zinc plated finish, they are available in five imperial coarse thread sizes from 1/4" to 1/2".
Product Specifications
| Material | Case-hardened steel |
|---|---|
| Finish | Zinc plated |
| Thread Form | UNC – Unified National Coarse |
| Nut Type | Hexagon large flange nut |
| Bearing Face | Serrated underside |
| Size Range | 1/4" to 1/2" |
Available Thread Sizes
| Nominal Thread Size | UNC Thread Designation | Threads Per Inch |
|---|---|---|
| 1/4" | 1/4-20 UNC | 20 TPI |
| 5/16" | 5/16-18 UNC | 18 TPI |
| 3/8" | 3/8-16 UNC | 16 TPI |
| 7/16" | 7/16-14 UNC | 14 TPI |
| 1/2" | 1/2-13 UNC | 13 TPI |
Integral Serrated Flange
The integral flange provides a broad contact area beneath the nut. Its serrations work against the surface directly beneath them, making these nuts useful where additional resistance to rotation is required.
Allow for the serrations when choosing the bearing surface, as they can mark paint, coatings and softer materials.
Selecting and Installing
Match the nut to the diameter and pitch of the mating UNC bolt, screw or stud. Sizes refer to the nominal thread diameter, rather than the spanner size.
Use a correctly fitting spanner or socket and follow the tightening requirements for the assembly. Select the required thread size and pack quantity using the product options.
