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Medium-Strength Steel Locknuts
for use with Cotter Pins—Grade 5
Secure these hex slotted nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Height includes the slots. Cotter pins are not included. They're zinc plated to resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Grade 5  | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 1/16" | 0.07" | 0.072" | 25 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 7/32" | 1/16" | 0.07" | 0.072" | 10 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 17/64" | 5/64" | 0.09" | 0.078" | 25 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 21/64" | 7/64" | 0.12" | 0.11" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | 7/64" | 0.12" | 0.11" | 10 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | 7/64" | 0.12" | 0.135" | 25 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 3/8" | 7/64" | 0.12" | 0.135" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 7/64" | 0.15" | 0.137" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | 7/64" | 0.15" | 0.137" | 10 | 000000000 | 0000 |
| 9/16"-12 | 7/8" | 31/64" | 9/64" | 0.15" | 0.163" | 10 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 31/64" | 9/64" | 0.15" | 0.163" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | 5/32" | 0.18" | 0.195" | 10 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | 5/32" | 0.18" | 0.195" | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | 5/32" | 0.18" | 0.217" | 5 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 41/64" | 5/32" | 0.18" | 0.217" | 5 | 000000000 | 0000 |
| 7/8"-14 | 1 5/16" | 49/64" | 3/16" | 0.18" | 0.204" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 55/64" | 3/16" | 0.24" | 0.241" | 1 | 000000000 | 0000 |
| 1"-14 | 1 1/2" | 55/64" | 3/16" | 0.24" | 0.241" | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 1 7/8" | 1 3/32" | 5/16" | 0.31" | 0.33" | 1 | 000000000 | 0000 |
| 1 1/4"-12 | 1 7/8" | 1 3/32" | 5/16" | 0.31" | 0.33" | 1 | 000000000 | 0000 |