| FASTENER LENGTH | 2.648 INCHES NOMINAL |
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.928 INCHES MINIMUM AND 0.938 INCHES MAXIMUM |
| HEAD HEIGHT | 0.562 INCHES NOMINAL |
| HEAD STYLE | BEVEL-CONICAL |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.5625 INCHES |
| WIDTH ACROSS FLATS | 0.4380 INCHES MINIMUM AND 0.4410 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.850 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNF |