| FASTENER LENGTH | 4.230 INCHES MINIMUM AND 4.370 INCHES MAXIMUM |
| HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.540 INCHES MINIMUM AND 0.620 INCHES MAXIMUM |
| HEAD LENGTH | 1.250 INCHES MINIMUM AND 1.340 INCHES MAXIMUM |
| HEAD STYLE | TEE NO. 3 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 OVERALL |
| MINIMUM TENSILE STRENGTH | 166000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.875 INCHES |
| SPECIAL FEATURES | GROUND CORNERS ON HEAD T030.0 DEG |
| WIDTH BETWEEN FLATS | 0.950 INCHES MINIMUM AND 1.010 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TYPE 2 CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.460 INCHES MINIMUM AND 1.740 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 14 |
| THREAD SERIES DESIGNATOR | UNF |