Slotted Nut
A hex nut with slots cut in the top of it to be used with a cotter pin to prevent loosening.
Castle Nut: A common type of slotted nut. The slotted part of this nut is tapered down. They are interchangeable with standard slotted nuts.
Installation: Spin nut onto the mating part until the slots on the nut matches up to the drilled hole (there must be a hole drilled through the threads of the mating part). A cotter pin is then inserted through the slots and hole, preventing the nut from loosening.
Dimensions
ASME B18.2.2
| Thread Dia. | Across Flats | Thickness |
|---|---|---|
| 1/4 | 7/16 | 7/32 |
| 5/16 | 1/2 | 17/64 |
| 3/8 | 9/16 | 21/64 |
| 7/16 | 11/16 | 3/8 |
| 1/2 | 3/4 | 7/16 |
| 9/16 | 7/8 | 31/64 |
| 5/8 | 15/16 | 35/64 |
| 3/4 | 1 1/8 | 41/64 |
| 7/8 | 1 5/16 | 3/4 |
| 1 | 1 1/2 | 55/64 |
| 1 1/8 | 1 11/16 | 31/32 |
| 1 1/4 | 1 7/8 | 1 1/16 |
| 1 3/8 | 2 1/16 | 1 11/64 |
| 1 1/2 | 2 1/4 | 1 9/32 |
| 2 | 3 | 1 23/32 |