| EXTENDED WASHER DIAMETER | 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.030 INCHES MINIMUM AND 0.050 INCHES MAXIMUM |
| HEAD HEIGHT | 0.162 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| PRIMARY WASHER MATERIAL THICKNESS | 0.025 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.494 INCHES MINIMUM AND 0.506 INCHES MAXIMUM |
| SPECIAL FEATURES | FURNISHED WITH ONE LOCK WASHER ROCKWELL C SCALE 40 MIN,50 MAX |
| WASHER QUANTITY | 1 |
| WIDTH BETWEEN FLATS | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNC |