| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 2.120 INCHES NOMINAL |
| MATERIAL | STEEL COMP 8640 OR STEEL COMP 4140 |
| NOMINAL THREAD SIZE | 0.500 INCHES NUT THREAD |
| SPECIAL FEATURES | FIRST TWO THREADS MAX TO HAVE PD OF 0.4470 TO 0.4500 INCHES ON STUD END |
| SURFACE FINISH | 32.0 MICROINCHES NUT THD |
| SURFACE FINISH | 32.0 MICROINCHES STUD THD |
| 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 | 0.750 INCHES NOMINAL NUT THREAD |
| THREAD LENGTH | 0.990 INCHES NOMINAL STUD THREAD |
| THREAD PITCH DIAMETERS | +0.4565 TO 0.4579 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) NUT THREAD |
| THREAD QUANTITY PER INCH | 20 NUT THREAD |