| FASTENER LENGTH | 0.125 INCHES NOMINAL |
| HEAD HEIGHT | 0.020 INCHES MINIMUM AND 0.026 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.142 INCHES MINIMUM AND 0.152 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-W-321 COMP A OR B,1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 12 TYPE AND 3 CLASS AND F GRADE |
| SHANK DIAMETER | 0.085 INCHES MINIMUM AND 0.089 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OR CHROMATE OVERALL |