| FASTENER LENGTH | 4.469 INCHES MINIMUM AND 4.531 INCHES MAXIMUM |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 1.297 INCHES MINIMUM AND 1.312 INCHES MAXIMUM |
| HEAD HEIGHT | 0.989 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OR STEEL COMP 384 OR STEEL COMP XM-7 OVERALL |
| MINIMUM TENSILE STRENGTH | 130000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 1.000 INCHES |
| NONDEFINITIVE SPEC/STD DATA | 1 TYPE |
| WIDTH ACROSS FLATS | 0.625 INCHES MINIMUM AND 0.629 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 TY 2 CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 2.500 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 8 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |