| HEAD DIAMETER | 0.312 INCHES MINIMUM AND 0.344 INCHES MAXIMUM |
| HEAD LENGTH | 0.125 INCHES MINIMUM AND 0.135 INCHES MAXIMUM |
| LOCKING FEATURE | SELF-CLINCHING HEAD |
| OVERALL LENGTH | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE |
| MATERIAL | STEEL CORROSION RESISTING |
| NOMINAL THREAD SIZE | 0.250 INCHES LOCATION NOT OTHERWISE SPECIFIED |
| STYLE DESIGNATOR | SELF-LOCKING |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2A LOCATION NOT OTHERWISE SPECIFIED |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.525 INCHES MINIMUM AND 0.625 INCHES MAXIMUM STUD THREAD |
| THREAD QUANTITY PER INCH | 20 LOCATION NOT OTHERWISE SPECIFIED |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |