| OVERALL LENGTH | 1.250 INCHES NOMINAL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES STUD THREAD |
| NUT END SHANK DIAMETER | 0.250 INCHES NOMINAL |
| NUT END SHANK LENGTH | 0.181 INCHES NOMINAL |
| SHOULDER DIAMETER | 0.365 INCHES MINIMUM AND 0.370 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.110 INCHES MINIMUM AND 0.115 INCHES MAXIMUM |
| SPECIAL FEATURES | COUNTERSUNK BOTH ENDS; RELIEF BOTH ENDS 0.072 IN. WIDE; 0.171 IN. DIA |
| STYLE DESIGNATOR | SHOULDERED |
| THREAD CLASS | 3A NUT THREAD |
| THREAD CLASS | 3A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.500 INCHES NOMINAL NUT THREAD |
| THREAD LENGTH | 0.312 INCHES NOMINAL STUD THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) NUT THREAD |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) STUD THREAD |
| THREAD QUANTITY PER INCH | 20 NUT THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |