| COUNTERSINK ANGLE | 20.0 DEGREES NOMINAL |
| FASTENER LENGTH | 0.718 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| HEAD DIAMETER | 0.194 INCHES MINIMUM AND 0.198 INCHES MAXIMUM |
| HEAD HEIGHT | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM |
| HEAD STYLE | FLAT COUNTERSUNK UNDERCUT |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| MATERIAL | IRON ALLOY 660 OVERALL |
| MINIMUM TENSILE STRENGTH | 170000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| SURFACE FINISH | 32.0 MICROINCHES SIDES OF HEAD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.510 INCHES MINIMUM AND 0.546 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.0937 INCHES MINIMUM AND 0.0952 INCHES MAXIMUM |