| COLOR | BLACK FASTENER |
| FASTENER LENGTH | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD STYLE | HEADLESS (SETSCREW) |
| INTERNAL DRIVE STYLE | HEXAGON |
| LOCKING FEATURE | PATCH OR STRIP THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | FED-STD-66, 300 SERIES FED STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| MATERIAL | STEEL CORROSION RESISTING FASTENER |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| POINT STYLE | CUP |
| WIDTH ACROSS FLATS | 0.062 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924, CLASS 4 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER |
| SURFACE TREATMENT | OXIDE FASTENER |
| THREAD LENGTH | 0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |