| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 2.340 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES |
| MATERIAL | STEEL COMP 4140 OR STEEL COMP 8640 OR STEEL COMP 8740 |
| NOMINAL THREAD SIZE | 0.375 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES STUD THREAD |
| SPECIAL FEATURES | MIN FIRST THREAD ANY MAX FIRST TWO THREADS HAVE PITCH DIA OF 0.3401 IN. MIN,0.3421 IN. MAX PITCH DIA ON STUD END |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.780 INCHES MINIMUM AND 0.880 INCHES MAXIMUM STUD THREAD |
| THREAD LENGTH | 1.000 INCHES MINIMUM AND 1.100 INCHES MAXIMUM NUT THREAD |
| THREAD PITCH DIAMETERS | +0.3435 TO 0.3451 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNC STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD QUANTITY PER INCH | 16 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |