| FASTENER LENGTH | 0.500 INCHES NOMINAL |
| HEAD DIAMETER | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| HEAD HEIGHT | 0.091 INCHES MINIMUM AND 0.103 INCHES MAXIMUM |
| HEAD STYLE | ROUND |
| INTERNAL DRIVE STYLE | SLOT |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613,COMP 1 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626,COMP 1 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-728,COMP B FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321,COMP 6 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321,COMP 7 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 268 OR COPPER ALLOY 260 OR COPPER ALLOY 270 OVERALL |
| NONDEFINITIVE SPEC/STD DATA | 1SSJST1S TYPE |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.138 INCHES |
| NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |