DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.834 INCHES MINIMUM AND 0.854 INCHES MAXIMUM FIRST HOLE |
FASTENER LENGTH | 0.985 INCHES MINIMUM AND 1.015 INCHES MAXIMUM |
HEAD DIAMETER | 0.430 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
HEAD HEIGHT | 0.226 INCHES NOMINAL |
HEAD STYLE | BEVEL-CONICAL |
INTERNAL DRIVE STYLE | HEXAGON |
MATERIAL | STEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 6150 OR STEEL COMP 3140 OR STEEL COMP 3135 OVERALL |
MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
NOMINAL THREAD DIAMETER | 0.250 INCHES |
SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE |
SPECIFICATION/STANDARD DATA | 80205-NAS144 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
WIDTH ACROSS FLATS | 0.219 INCHES MINIMUM AND 0.221 INCHES MAXIMUM |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL |
THREAD CLASS | 3A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 0.475 INCHES MINIMUM AND 0.525 INCHES MAXIMUM |
THREAD SERIES DESIGNATOR | UNJF |
THREAD QUANTITY PER INCH | 28 |