| FASTENER LENGTH | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| HEAD HEIGHT | 0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM |
| HEAD STYLE | OVAL/TRUSS |
| HEAD MAJOR DIAMETER | 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM |
| HOLE DEPTH | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM |
| HOLE DIAMETER | 0.099 INCHES MINIMUM AND 0.104 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-W-321 1/4 HARD FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | COPPER ALLOY 270 OR COPPER ALLOY 260 OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 12 TYPE AND 3 CLASS AND F GRADE |
| SHANK DIAMETER | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM |
| SHANK STYLE | TUBULAR |
| SHEAR STRENGTH | 36000 DOUBLE POUNDS PER SQUARE INCH |