| FASTENER LENGTH | 1.250 INCHES NOMINAL |
| HEAD DIAMETER | 0.429 INCHES MINIMUM AND 0.457 INCHES MAXIMUM |
| HEAD HEIGHT | 0.155 INCHES MINIMUM AND 0.170 INCHES MAXIMUM |
| HEAD STYLE | ROUND |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-321 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-613 FED SPEC 2ND MATERIAL RESPONSE OR QQ-B-626 FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.242 INCHES |
| NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |