| DISTANCE FROM COTTER PIN HOLE CENTERLINE TO NUT END | 0.120 INCHES MINIMUM AND 0.140 INCHES MAXIMUM FIRST HOLE |
| HARDNESS RATING | 42.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 1.060 INCHES MINIMUM AND 1.105 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | HS178 COMB MS2776 FSC-73030 MFR REF SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES STUD THREAD |
| NUT END SHANK LENGTH | 0.360 INCHES MINIMUM AND 0.367 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SHOULDER DIAMETER | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM |
| SHOULDER LENGTH | 0.038 INCHES MINIMUM AND 0.040 INCHES MAXIMUM |
| STUD END SHANK DIAMETER | 0.250 INCHES NOMINAL |
| STUD END SHANK LENGTH | 0.078 INCHES NOMINAL |
| STYLE DESIGNATOR | SHOULDERED |
| THREAD CLASS | 2A NUT THREAD |
| THREAD CLASS | 3A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.320 INCHES NOMINAL STUD THREAD |
| THREAD LENGTH | 0.240 INCHES MINIMUM AND 0.280 INCHES MAXIMUM NUT THREAD |
| THREAD QUANTITY PER INCH | 20 STUD THREAD |
| THREAD QUANTITY PER INCH | Z8 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNC STUD THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |