DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY HEAD HEIGHT AND THREAD LENGTH |
FASTENER LENGTH | 0.875 INCHES NOMINAL |
HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
HEAD DIAMETER | 0.429 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
HEAD HEIGHT | 0.243 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
HEAD STYLE | FLAT CHAMFER |
INTERNAL DRIVE STYLE | HEXAGON |
MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
MATERIAL | STEEL OVERALL |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
MINIMUM YIELD STRENGTH | 130000 POUNDS PER SQUARE INCH |
NOMINAL THREAD DIAMETER | 0.312 INCHES |
NONDEFINITIVE SPEC/STD DATA | 1 TYPE |
WIDTH ACROSS FLATS | 0.219 INCHES NOMINAL |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.575 INCHES MINIMUM |
THREAD QUANTITY PER INCH | 18 |
THREAD SERIES DESIGNATOR | UNC |