| FASTENER LENGTH | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| HARDNESS RATING | 88.0 ROCKWELL C MINIMUM PRIMARY WASHER |
| HEAD DIAMETER | 0.208 INCHES MINIMUM AND 0.226 INCHES MAXIMUM |
| HEAD HEIGHT | 0.111 INCHES MINIMUM AND 0.132 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-W-321 COMP 6,7,8 FED SPEC ALL MATERIAL RESPONSES FASTENER |
| MATERIAL | COPPER ALLOY PRIMARY WASHER |
| MATERIAL | COPPER ALLOY 260 OR COPPER ALLOY 270 OR COPPER ALLOY 274 FASTENER |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| PRIMARY WASHER MATERIAL THICKNESS | 0.013 INCHES MINIMUM AND 0.018 INCHES MAXIMUM |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | FLAT INTERNAL TEETH |
| WASHER QUANTITY | 1 |
| SURFACE TREATMENT | NICKEL FASTENER |
| SURFACE TREATMENT | NICKEL PRIMARY WASHER |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.264 INCHES MINIMUM AND 0.295 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNC |