| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.154 INCHES MINIMUM AND 0.161 INCHES MAXIMUM |
| HEAD HEIGHT | 0.095 INCHES MINIMUM AND 0.099 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL | STEEL OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| PROPRIETARY CHARACTERISTICS | MRCS |
| MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
| MINIMUM YIELD STRENGTH | 155000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.099 INCHES |
| SPECIFICATION/STANDARD DATA | 80205-NAS1352 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| WIDTH ACROSS FLATS | 0.0781 INCHES MINIMUM AND 0.0791 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924,CL1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | OXIDE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.428 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 48 |
| THREAD SERIES DESIGNATOR | UNRC |