DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.825 INCHES NOMINAL FIRST HOLE |
FASTENER LENGTH | 0.880 INCHES NOMINAL |
HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
HEAD DIAMETER | 0.250 INCHES MINIMUM AND 0.262 INCHES MAXIMUM |
HEAD HEIGHT | 0.063 INCHES MINIMUM AND 0.073 INCHES MAXIMUM |
HEAD STYLE | BUTTON |
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 | 0.138 INCHES |
SHANK UNTHREADED HOLE DIAMETER | 0.040 INCHES NOMINAL FIRST HOLE |
WIDTH ACROSS FLATS | 0.078 INCHES NOMINAL |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.530 INCHES MINIMUM |
THREAD QUANTITY PER INCH | 40 |
THREAD SERIES DESIGNATOR | UNF |