Known as: Prevailing Torque Lock Nut & Stover Grade C
Type A = NCLA020----Z1
Type B = NCLB050----Z1
Type C = NCLC080----Z1
| Nominal Size | T | W | B | Weight per C | |
| Across Flats | Total Height | Hex Height | |||
| Max | Min | ||||
| 1/4 | 7/16 | .226 | .212 | .145 | .7 |
| 5/16 | 1/2 | .273 | .258 | .166 | 1.10 |
| 3/8 | 9/16 | .337 | .320 | .198 | 1.60 |
| 7/16 | 11/16 | .385 | .365 | .223 | 2.80 |
| 1/2 | 3/4 | .448 | .427 | .262 | 3.80 |
| 9/16 | 7/8 | .496 | .473 | .286 | 5.80 |
| 5/8 | 15/16 | .559 | .535 | .329 | 7.30 |
| 3/4 | 1-1/8 | .665 | .617 | .382 | 11.9 |
| 7/8 | 1-5/16 | .776 | .724 | .450 | 19.00 |
| 1 | 1-1/2 | .887 | .831 | .513 | 28.30 |
Disclaimer: The dimensions listed are for reference only. Sizes not listed may be available off the shelf or can be manufactured to customer requirements.