| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 5.500 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 8640 |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES STUD THREAD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.500 INCHES MINIMUM AND 0.590 INCHES MAXIMUM NUT THREAD |
| THREAD LENGTH | 0.560 INCHES MINIMUM AND 0.590 INCHES MAXIMUM STUD THREAD |
| THREAD PITCH DIAMETERS | +0.2231 TO 0.2244 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |