| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 2.130 INCHES MINIMUM AND 2.170 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 8740 OR STEEL COMP 4140 |
| NOMINAL THREAD SIZE | 0.375 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.438 INCHES STUD THREAD |
| SHANK DIAMETER | 0.286 INCHES MINIMUM AND 0.289 INCHES MAXIMUM |
| STYLE DESIGNATOR | STEPPED |
| SPECIAL FEATURES | STUD END THREAD 0.003 IN. OVERSIZE |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.630 INCHES MINIMUM AND 0.670 INCHES MAXIMUM STUD THREAD |
| THREAD LENGTH | 0.670 INCHES MINIMUM AND 0.720 INCHES MAXIMUM NUT THREAD |
| THREAD PITCH DIAMETERS | +0.3916 TO 0.3936 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |
| THREAD QUANTITY PER INCH | 14 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |