| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.500 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.420 INCHES MINIMUM AND |
| 0.450 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000,COND E1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | LCP77-1061 MFR REF 1ST TREATMENT RESPONSE AND |
| LCP77-2035 FSCM 36659 MFR REF 2ND TREATMENT RESPONSE OVERALL |
| STYLE DESIGNATOR | CONCENTRIC HOLE UNTHREADED |
| SHOULDER DIAMETER | 1.248 INCHES MINIMUM AND |
| 1.249 INCHES MAXIMUM |
| SHOULDER LENGTH | 7.705 INCHES MINIMUM AND |
| 7.715 INCHES MAXIMUM |
| CONCENTRIC HOLE DEPTH | 7.200 INCHES NOMINAL |
| CONCENTRIC HOLE DIAMETER | 0.968 INCHES MINIMUM AND |
| 0.979 INCHES MAXIMUM |
| HEAD DIAMETER | 1.800 INCHES NOMINAL |
| HEAD HEIGHT | 0.150 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 1.500 INCHES NOMINAL |
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 8.085 INCHES MINIMUM AND |
| 8.095 INCHES MAXIMUM FIRST HOLE |
| SHANK UNTHREADED HOLE DIAMETER | 0.108 INCHES MINIMUM AND |
| 0.116 INCHES MAXIMUM FIRST HOLE |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |