| FEATURES PROVIDED | SELF-LOCKING |
| FULL INTERNAL THREAD LENGTH | 0.3120 INCHES NOMINAL |
| INSERT SIZE | 0.3125-18 |
| INTERNAL THREAD RELIEF DEPTH | 0.3120 INCHES NOMINAL |
| LENGTH | 0.4720 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD SIZE | 0.3125 INCHES |
| THREAD QUANTITY PER INCH | A18 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| STYLE DESIGNATOR | KEYLOCK |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 2A |
| THREAD LENGTH | 0.3120 INCHES NOMINAL |