| DIAMETER OF RECESSED PORTION OF SHANK | 0.180 INCHES MINIMUM AND 0.184 INCHES MAXIMUM |
| DISTANCE ACROSS FLATS | 0.200 INCHES NOMINAL |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM |
| LENGTH OF RECESSED PORTION OF SHANK | 0.390 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| OVERALL LENGTH | 2.130 INCHES MINIMUM AND 2.170 INCHES MAXIMUM |
| MATERIAL | STEEL |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES STUD THREAD |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.510 INCHES MINIMUM NUT THREAD |
| THREAD LENGTH | 0.580 INCHES MINIMUM STUD THREAD |
| THREAD PITCH DIAMETERS | +0.2840 TO 0.2855 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 18 STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |