| COLOR | BLUE LOCKING FEATURE |
| FASTENER LENGTH | 3.750 INCHES NOMINAL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.921 INCHES MINIMUM AND 0.937 INCHES MAXIMUM |
| HEAD HEIGHT | 0.616 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| HEAD STYLE | FLAT CHAMFER |
| INTERNAL DRIVE STYLE | HEXAGON |
| LOCKING FEATURE | STRIP THREADS |
| MATERIAL DOCUMENT AND CLASSIFICATION | FF-S-86 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18240 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| MATERIAL | PLASTIC POLYCHLOROTRIFLUOROETHYLENE LOCKING FEATURE |
| MATERIAL | STEEL FASTENER |
| NOMINAL THREAD DIAMETER | 0.625 INCHES |
| WIDTH ACROSS FLATS | 0.500 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | FF-S-86 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| SURFACE TREATMENT | ZINC FASTENER |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.750 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES DESIGNATOR | UNF |