| COUNTERSINK ANGLE | 82.0 DEGREES NOMINAL |
| FASTENER LENGTH | 0.595 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| HARDNESS RATING | 80.0 ROCKWELL B NOMINAL OVERALL |
| HEAD DIAMETER | 0.311 INCHES MINIMUM AND 0.359 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 316 OVERALL |
| MINIMUM YIELD STRENGTH | 30000 POUNDS PER SQUARE INCH |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| WIDTH ACROSS FLATS | 0.094 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE AND MIL-C-13924 CL4 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE AND OXIDE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD LENGTH | 0.421 INCHES MINIMUM AND 0.451 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 32 |