THREAD SERIES DESIGNATOR | UNC |
NOMINAL THREAD DIAMETER | 0.375 INCHES |
THREAD QUANTITY PER INCH | 16 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.469 INCHES MINIMUM AND |
| 0.625 INCHES MAXIMUM |
FASTENER LENGTH | 0.594 INCHES MINIMUM AND |
| 0.625 INCHES MAXIMUM |
MATERIAL | PLASTIC POLYAMIDE LOCKING FEATURE |
| STEEL FASTENER |
SURFACE TREATMENT | CADMIUM AND |
| CHROMATE FASTENER |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND |
| 45.0 ROCKWELL C MAXIMUM OVERALL |
MINIMUM TENSILE STRENGTH | 170000 POUNDS PER SQUARE INCH |
MINIMUM YIELD STRENGTH | 150000 POUNDS PER SQUARE INCH |
HEAD STYLE | FLAT CHAMFER |
HEAD DIAMETER | 0.550 INCHES MINIMUM AND |
| 0.562 INCHES MAXIMUM |
HEAD HEIGHT | 0.368 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
INTERNAL DRIVE STYLE | HEXAGON |
WIDTH ACROSS FLATS | 0.312 INCHES MINIMUM AND |
| 0.316 INCHES MAXIMUM |
LOCKING FEATURE | PELLET OR |
| STRIP THREADS |
NONDEFINITIVE SPEC/STD DATA | 6 TYPE |
DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY LOCKING FEATURE |
SPEC/STD CONTROLLING DATA | |
MANUFACTURERS CODE | 81348 |
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS86 |