| FASTENER LENGTH | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM |
| GRIP LENGTH | 0.745 INCHES MINIMUM AND 0.760 INCHES MAXIMUM |
| HEAD HEIGHT | 0.037 INCHES MINIMUM AND 0.047 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.242 INCHES MINIMUM AND 0.262 INCHES MAXIMUM |
| HEAD STYLE | STRAIGHT PAN |
| LUBRICATION | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| MATERIAL | STEEL COMP E4340 OVERALL |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD SIZE | 0.164 INCHES |
| SHANK DIAMETER | 0.1625 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| SHEAR STRENGTH | 108000 SINGLE POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | MRC AATB: WIDTH ACROSS FLATS, NOTED WITH "EVIDENCE OF BROKEN EDGE ACROSS POINTS." NO DIMENSIONS PROVIDED |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNJC |