| FLANGE DIAMETER | 0.250 INCHES MINIMUM |
| INSERT SIZE | 0.250-20 UNC 3A |
| LENGTH | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM |
| NOMINAL THREAD SIZE | 0.164 INCHES |
| STYLE DESIGNATOR | KEYLOCK |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3B |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 32 |
| TOP UNTHREADED PORTION OUTSIDE DIAMETER | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| TOP PORTION UNTHREADED OUTSIDE LENGTH | 0.032 INCHES MINIMUM AND 0.042 INCHES MAXIMUM |