| DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS | 1.250 INCHES NOMINAL |
| FASTENER LENGTH | 4.190 INCHES NOMINAL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.320 INCHES NOMINAL |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD ALL MATERIAL RESPONSES OR SAE ASSN STD ALL MATERIAL RESPONSES OR 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 4032 OR STEEL COMP 5140 OR STEEL COMP 8637 OR STEEL COMP 8740 OVERALL |
| MINIMUM TENSILE STRENGTH | 120000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.437 INCHES |
| RIB LENGTH | 0.250 INCHES NOMINAL |
| RIB MAJOR DIAMETER | 0.635 INCHES MINIMUM AND 0.640 INCHES MAXIMUM |
| SHOULDER DIAMETER | 0.618 INCHES MINIMUM AND 0.624 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 3.490 INCHES NOMINAL FIRST SHOULDER |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| WIDTH BETWEEN FLATS | 1.120 INCHES NOMINAL |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.590 INCHES MINIMUM |
| THREAD SERIES DESIGNATOR | UNF |
| THREAD QUANTITY PER INCH | 20 |