| FASTENER LENGTH | 0.500 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 |
| HEAD STYLE | OVAL/TRUSS |
| HOLE DEPTH | 0.046 INCHES NOMINAL |
| HOLE DIAMETER | 0.039 INCHES MINIMUM AND 0.044 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-321,1/4 HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 260 OR COPPER ALLOY 270 OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 12 TYPE AND 3 CLASS AND F GRADE |
| SHANK DIAMETER | 0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM |
| SHANK STYLE | TUBULAR |
| SHEAR STRENGTH | 35000 DOUBLE POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | OPTIONAL TAPERED HOLE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-N-290,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | NICKEL OVERALL |