5306-00-274-1966 BOLT,MACHINE Index 5340-00-274-1984 COVER,ACCESS

National Stock Number:
5306-00-274-1981

Federal Supply Class:
5306

National Item Identification Number:
002741981

Description:
BOLT,MACHINE

Detail:
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 0.190 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 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.


Manufacturer Information:
321310055380HATCH & KIRK, INC.
321310072915GENERAL MOTORS CORP ELECTRO-MOTIVE DIV
323507955380HATCH & KIRK, INC.
323507972915GENERAL MOTORS CORP ELECTRO-MOTIVE DIV


Techincal Specification:
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY HEAD H,THD LG AND COTTER PIN HOLE
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER7.750 INCHES NOMINAL FIRST HOLE
FASTENER LENGTH8.125 INCHES NOMINAL
FEATURES PROVIDEDFINISHED HEAD
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.749 INCHES MINIMUM AND 0.813 INCHES MAXIMUM
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER1.250 INCHES
NONDEFINITIVE SPEC/STD DATA3 TYPE AND 8 GRADE
SHANK UNTHREADED HOLE DIAMETER0.219 INCHES NOMINAL FIRST HOLE
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH2.000 INCHES MINIMUM
THREAD QUANTITY PER INCH12
THREAD SERIES DESIGNATORUNF
WIDTH BETWEEN FLATS1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM


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