| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 0.844 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 3135 |
| NOMINAL THREAD SIZE | 0.190 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES STUD THREAD |
| SHANK DIAMETER | 0.140 INCHES MINIMUM AND 0.145 INCHES MAXIMUM |
| SPECIAL FEATURES | STUD END THREAD TO BE LOK-THRED OF LOCK THREAD CORP |
| 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 | 0.312 INCHES MINIMUM STUD THREAD |
| THREAD LENGTH | 0.375 INCHES MINIMUM NUT THREAD |
| THREAD PITCH DIAMETERS | +0.2103 TO 0.2150 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD QUANTITY PER INCH | 32 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |