AIR FORCE STANDARD | 99238 |
FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | 81348 |
FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | 81348 |
THREAD CLASS | 2A |
THREAD DIRECTION | RIGHT-HAND |
THREAD LENGTH | 1.500 INCHES MINIMUM |
FASTENER LENGTH | 6.500 INCHES NOMINAL |
HEAD STYLE | HEXAGON |
HEAD HEIGHT | 0.369 INCHES MINIMUM AND 0.413 INCHES MAXIMUM |
WIDTH BETWEEN FLATS | 0.906 INCHES MINIMUM AND 0.937 INCHES MAXIMUM |
NOMINAL THREAD DIAMETER | 0.625 INCHES |
FEATURES PROVIDED | FINISHED HEAD |
THREAD QUANTITY PER INCH | 11 |
MINIMUM TENSILE STRENGTH | 48000 POUNDS PER SQUARE INCH |
MATERIAL | STEEL OVERALL |
SURFACE TREATMENT | CADMIUM OVERALL OR ZINC OVERALL |
THREAD SERIES DESIGNATOR | UNC |
NONDEFINITIVE SPEC/STD DATA | C CLASS |
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of .19 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of . 15 inch ( . 38 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE. |