| FASTENER LENGTH | 0.156 INCHES NOMINAL |
| HEAD HEIGHT | 0.015 INCHES MINIMUM AND 0.019 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.104 INCHES MINIMUM AND 0.114 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 | 13 TYPE AND 3 CLASS AND F GRADE |
| SHANK DIAMETER | 0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OR CHROMATE OVERALL |