| FASTENER LENGTH | 3.625 INCHES NOMINAL |
| HARDNESS RATING | 23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.370 INCHES MINIMUM AND 0.430 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1345 OR STEEL COMP 4130 OR STEEL COMP 4140 OVERALL |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| SHOULDER DIAMETER | 0.6677 INCHES MINIMUM AND 0.6687 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER SHAPE | ROUND FIRST SHOULDER |
| SHOULDER LENGTH | 0.900 INCHES MINIMUM AND 0.950 INCHES MAXIMUM FIRST SHOULDER |
| WIDTH BETWEEN FLATS | 0.920 INCHES MINIMUM AND 0.940 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.000 INCHES NOMINAL |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNF |