| THREAD SERIES DESIGNATOR | UNS |
| NOMINAL THREAD DIAMETER | 1.000 INCHES |
| THREAD QUANTITY PER INCH | 14 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.000 INCHES MINIMUM |
| FASTENER LENGTH | 4.125 INCHES NOMINAL |
| MATERIAL | STEEL COMP 1340 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 8640 OR |
| STEEL COMP 8740 OVERALL |
| 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 |
| SURFACE TREATMENT | ZINC OVERALL |
| HARDNESS RATING | 30.0 ROCKWELL C MINIMUM AND |
| 35.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEXAGON |
| HEAD HEIGHT | 0.312 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 1.500 INCHES NOMINAL |
| SHOULDER SHAPE | RIBBED FIRST SHOULDER |
| SHOULDER DIAMETER | 1.123 INCHES MINIMUM AND |
| 1.124 INCHES MAXIMUM FIRST SHOULDER |
| SHOULDER LENGTH | 1.812 INCHES NOMINAL FIRST SHOULDER |
| RIB MAJOR DIAMETER | 1.130 INCHES MINIMUM AND |
| 1.135 INCHES MAXIMUM |
| RIB LENGTH | 1.000 INCHES NOMINAL |
| SPECIAL FEATURES | TAPPED HOLE IN.HEAD 5/8-18 UNF-2A BY 1.062 IN. LG |