A solid cylindrical pin with a slightly larger diameter head and a drilled hole at the bottom. It is meant to go through a hole in an object and then a cotter pin is placed through the bottom hole to secure it in place. Used commonly on forged clevises.
ASME B18.8.1
| Pin Dia. | Head Dia. | Cotter Pin |
|---|---|---|
| 3/16 | 0.30 - 0.32 | 1/16 |
| 1/4 | 0.36 - 0.38 | 1/16 |
| 5/16 | 0.42 - 0.44 | 3/32 |
| 3/8 | 0.49 - 0.51 | 3/32 |
| 7/16 | 0.55 - 0.57 | 3/32 |
| 1/2 | 0.61 - 0.63 | 1/8 |
| 5/8 | 0.80 - 0.82 | 1/8 |
| 3/4 | 0.92 - 0.94 | 5/32 |
| 7/8 | 1.02 - 1.04 | 5/32 |
| 1 | 1.17 - 1.19 | 5/32 |