| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 1.880 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6300 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6320 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 3RD MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 4037 OR STEEL COMP 8735 OR STEEL COMP 8740 |
| NOMINAL THREAD SIZE | 0.312 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.312 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 | 0.720 INCHES MAXIMUM NUT THREAD |
| THREAD LENGTH | 0.940 INCHES MAXIMUM STUD THREAD |
| THREAD QUANTITY PER INCH | 18 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |
| THREAD PITCH DIAMETERS | +0.2869 TO 0.2884 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNC STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |