| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 1.680 INCHES MINIMUM AND 1.720 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6320 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6382 ASSN STD 2ND MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 8735 OR STEEL COMP 4140 |
| NOMINAL THREAD SIZE | 0.312 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES STUD THREAD |
| SHANK DIAMETER | 0.282 INCHES MINIMUM AND 0.286 INCHES MAXIMUM |
| SPECIAL FEATURES | STUD END THREAD 0.012 IN. OVERSIZE |
| STYLE DESIGNATOR | STEPPED |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.730 INCHES MINIMUM STUD THREAD |
| THREAD LENGTH | 0.620 INCHES MINIMUM NUT THREAD |
| THREAD PITCH DIAMETERS | +0.3520 TO 0.3530 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 16 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |