| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 7456 ASSN STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 8740 |
| NOMINAL THREAD SIZE | 0.312 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES STUD THREAD |
| SHOULDER DIAMETER | 0.331 INCHES MINIMUM AND 0.335 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.170 INCHES MINIMUM AND 0.210 INCHES MAXIMUM |
| SPECIAL FEATURES | 4 SHOULDERS,TWO CLOSE TOGETHER 0.480-0.520 IN. LG; EACH END; SPACE BETWEEN TWO SHOULDERS 0.110-0.120 BOTH ENDS; PD AFTER PLATING 0.3840-0.3855 IN. THD A |
| STUD END SHANK DIAMETER | 0.236 INCHES MINIMUM AND 0.240 INCHES MAXIMUM |
| STUD END SHANK LENGTH | 1.790 INCHES MINIMUM AND 1.850 INCHES MAXIMUM |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD CLASS | 3A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM STUD THREAD |
| THREAD LENGTH | 0.750 INCHES MINIMUM AND 0.770 INCHES MAXIMUM NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |
| THREAD QUANTITY PER INCH | 18 NUT THREAD |
| THREAD QUANTITY PER INCH | 18 STUD THREAD |