5306-01-507-7350, BOLT,MACHINE

National Stock Number:
5306-01-507-7350

Federal Supply Class:
5306

National Item Identification Number:
015077350

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:

MS9490-23

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD DIRECTION	RIGHT-HAND
FASTENER LENGTH	1.552 INCHES MINIMUM AND
	1.572 INCHES MAXIMUM
MATERIAL	IRON ALLOY 660 OVERALL
THREAD LENGTH	0.740 INCHES MINIMUM AND
	0.820 INCHES MAXIMUM
HEAD STYLE	HEXAGON
THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	28
THREAD CLASS	3A
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	24.0 ROCKWELL C MINIMUM AND
	35.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	130000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH	85000 POUNDS PER SQUARE INCH
HEAD HEIGHT	0.240 INCHES MINIMUM AND
	0.260 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.430 INCHES MINIMUM AND
	0.439 INCHES MAXIMUM
HOLE CONFIGURATION STYLE	HEXAGON LONGITUDINAL HOLE
HOLE TYPE	DRILLED
HOLE QUANTITY	6
HOLE DIAMETER	0.060 INCHES MINIMUM AND
	0.080 INCHES MAXIMUM
GRIP LENGTH	0.752 INCHES MINIMUM AND
	0.812 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
	32.0 MICROINCHES GRIP
	32.0 MICROINCHES THREADS
FEATURES PROVIDED	FINISHED HEAD
PART NAME ASSIGNED BY CONTROLLING AGENCY	BOLT,MACHINE-HEXAGON HEAD,FULL SHANK,AMS5731,.250-28 UNJF-3A
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MS9490-23

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