THREAD SERIES DESIGNATOR | UNRC |
NOMINAL THREAD DIAMETER | 0.138 INCHES |
THREAD QUANTITY PER INCH | 32 |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.188 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
FASTENER LENGTH | 0.220 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
MATERIAL | STEEL OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
SURFACE TREATMENT | OXIDE OVERALL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-13924, CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND |
| 45.0 ROCKWELL C MAXIMUM OVERALL |
MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH |
MINIMUM YIELD STRENGTH | 130000 POUNDS PER SQUARE INCH |
HEAD STYLE | FLAT CHAMFER |
HEAD DIAMETER | 0.218 INCHES MINIMUM AND |
| 0.226 INCHES MAXIMUM |
HEAD HEIGHT | 0.134 INCHES MINIMUM AND |
| 0.138 INCHES MAXIMUM |
INTERNAL DRIVE STYLE | HEXAGON |
WIDTH ACROSS FLATS | 0.109 INCHES MINIMUM AND |
| 0.111 INCHES MAXIMUM |
NONDEFINITIVE SPEC/STD DATA | 6 TYPE |
SPEC/STD CONTROLLING DATA | |
MANUFACTURERS CODE | 81348 |
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS86 |