| INSERT SIZE | 0.500-20 UNF 2A |
| LENGTH | 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SLOT WIDTH | 0.062 INCHES NOMINAL |
| SLOT DEPTH | 0.046 INCHES NOMINAL |
| TOP UNTHREADED PORTION OUTSIDE DIAMETER | 0.430 INCHES MINIMUM AND 0.435 INCHES MAXIMUM |
| TOP PORTION UNTHREADED OUTSIDE LENGTH | 0.109 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2B |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |