| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 0.828 INCHES MINIMUM AND 0.875 INCHES MAXIMUM |
| HEAD DIAMETER | 0.257 INCHES MINIMUM AND 0.279 INCHES MAXIMUM |
| HEAD STYLE | OVAL COUNTERSUNK |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 6S STYLE |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.138 INCHES |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613,COMP 1 FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-B-626,COMP 1 FED SPEC 1ST MATERIAL RESPONSE OVERALL OR QQ-B-728,COMP B FED SPEC 2ND MATERIAL RESPONSE OVERALL OR QQ-W-321,COMP 6 FED SPEC 2ND MATERIAL RESPONSE OVERALL OR QQ-W-321,COMP 7 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 268 OVERALL OR COPPER ALLOY 260 OVERALL OR COPPER ALLOY 270 OVERALL |