Flange Nut
These nuts have a large flanged surface, similar to a washer, to distribute the load for a stronger connection. Some have an additional locking feature like a nylon insert or serrations under the head.
Other Names: Whiz Nut, Frame Lock Nut
Dimensions - Serrated Flange Nut
ASME B18.16.4
| Thread Dia. | Across Flats | Flange Dia. |
|---|---|---|
| No. 6 | 5/16 | 0.406 - 0.422 |
| No. 8 | 11/32 | 0.452 - 0.381 |
| No. 10 | 3/8 | 0.480 - 0.500 |
| 1/4 | 7/16 | 0.574 - 0.594 |
| 5/16 | 1/2 | 0.660 - 0.680 |
| 3/8 | 9/16 | 0.728 - 0.750 |
| 7/16 | 11/16 | 0.910 - 0.937 |
| 1/2 | 3/4 | 1.000 - 1.031 |
| 9/16 | 7/8 | 1.155 - 1.188 |
| 5/8 | 15/16 | 1.248 - 1.281 |
| 3/4 | 1 1/8 | 1.460 - 1.500 |