| INSERT SIZE | 0.250-20 UNC 3A |
| LENGTH | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633,COND ANNEALED-CANCELED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1117 OVERALL |
| NOMINAL THREAD SIZE | 0.164 INCHES |
| TOP UNTHREADED PORTION OUTSIDE DIAMETER | 0.169 INCHES NOMINAL |
| TOP PORTION UNTHREADED OUTSIDE LENGTH | 0.037 INCHES MINIMUM AND 0.042 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 0.250 INCHES NOMINAL |
| STYLE DESIGNATOR | KEYLOCK |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |