5306-00-558-8223, BOLT,MACHINE

National Stock Number:
5306-00-558-8223

Federal Supply Class:
5306

National Item Identification Number:
005588223

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:

181610	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
215411	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
MS35298-36	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

FASTENER LENGTH	1.250 INCHES NOMINAL
MATERIAL	STEEL OVERALL
THREAD LENGTH	0.875 INCHES MINIMUM
HEAD STYLE	HEXAGON
THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.312 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	2A
SURFACE TREATMENT	CADMIUM AND
	CHROMATE OR
	ZINC AND
	CHROMATE OVERALL
HARDNESS RATING	23.0 ROCKWELL C MINIMUM AND
	30.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	120000 POUNDS PER SQUARE INCH
HEAD HEIGHT	0.195 INCHES MINIMUM AND
	0.211 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.489 INCHES MINIMUM AND
	0.500 INCHES MAXIMUM
GRIP LENGTH	0.375 INCHES NOMINAL
FEATURES PROVIDED	FINISHED HEAD
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MS35298-36

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