| FASTENER LENGTH | 2.906 INCHES MINIMUM AND 3.000 INCHES MAXIMUM |
| HEAD HEIGHT | 0.139 INCHES MINIMUM AND 0.159 INCHES MAXIMUM |
| HEAD DIAMETER | 0.382 INCHES MINIMUM AND 0.408 INCHES MAXIMUM |
| HEAD STYLE | ROUND |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 ALLOY 260 1/4 H FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-613 ALLOY 268 1/4 H FED SPEC 2ND MATERIAL RESPONSE OR QQ-B-626 ALLOY 260 1/4 H FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-626 ALLOY 268 1/4 H FED SPEC 2ND MATERIAL RESPONSE OR QQ-W-321 ALLOY 260 1/4 H FED SPEC 1ST MATERIAL RESPONSE OR QQ-W-321 ALLOY 270 1/4 H FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | COPPER ALLOY 260 OR COPPER ALLOY 268 OR COPPER ALLOY 270 OVERALL |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.216 INCHES |
| NONMACHINE THREAD STYLE | GIMLET POINT (TYPE A, AB OR BA) |