| HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 2.180 INCHES MINIMUM AND 2.220 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 8735 OR STEEL COMP 4140 |
| NOMINAL THREAD SIZE | 0.438 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.500 INCHES STUD THREAD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SHANK DIAMETER | 0.331 INCHES MINIMUM AND 0.335 INCHES MAXIMUM |
| SPECIAL FEATURES | STUD END THREAD 0.012 IN. OVERSIZE |
| STYLE DESIGNATOR | STEPPED |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.770 INCHES MINIMUM NUT THREAD |
| THREAD LENGTH | 0.980 INCHES MINIMUM STUD THREAD |
| THREAD PITCH DIAMETERS | +0.4024 TO 0.4045 INCHES NUT THREAD |
| THREAD PITCH DIAMETERS | +0.4682 TO 0.4692 INCHES STUD THREAD |
| THREAD SERIES DESIGNATOR | UNC STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD QUANTITY PER INCH | 13 STUD THREAD |
| THREAD QUANTITY PER INCH | 20 NUT THREAD |