| FASTENER LENGTH | 0.312 INCHES NOMINAL |
| HEAD DIAMETER | 0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM |
| HEAD HEIGHT | 0.118 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-7647 MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL | STEEL COMP 1095 PRIMARY WASHER |
| MATERIAL | STEEL FASTENER |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.038 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.372 INCHES MINIMUM AND 0.383 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT INTERNAL TEETH |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.274 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNF |