Castle Nuts, Stainless Steel 304, 1/2-20
Slotted Nuts, also called Castellated Nuts, in 304 Stainless Steel
- Used with a cotter pin
- Notched on one side
- Torque the nut then aligns with the closest hole
- Used with a bolt or axle that has a hole in it
A Castle nut, castellated nut, or slotted nut is normally used with a Cotter Pin to create a locking fastener assembly that cannot be loosened due to accidental vibration. It is common to see this type of nut on vehicles and machinery where vibration is frequent.
| Nut Sizes | Width Across Flats | Overall Height |
| #10 | 0.375" REF | 0.248" REF |
| 1/4" | 0.434" REF | 0.281" REF |
| 5/16" | 0.499" REF | 0.326" REF |
| 3/8" | 0.562" REF | 0.410" REF |
| 7/16" | 0.686" REF | 0.456" REF |
| 1/2" | 0.745" REF | 0.569" REF |
| 5/8" | 0.934" REF | 0.724" REF |
| 3/4" | 1.125" REF | 0.820" REF |
| 7/8" | 1.126" REF | 0.814" REF |
| 1" | 1.498" REF | 1.005" REF |
Product number:
129050