5306-00-206-4276, BOLT,MACHINE

National Stock Number:
5306-00-206-4276

Federal Supply Class:
5306

National Item Identification Number:
002064276

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:

FF-S-85C TY II STY 10P GR 5	81348	FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC
MILB857GRADE4TYPE2	81349	MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD DIRECTION	RIGHT-HAND
FASTENER LENGTH	0.844 INCHES MINIMUM AND
	0.875 INCHES MAXIMUM
MATERIAL	STEEL OVERALL
THREAD LENGTH	0.750 INCHES MINIMUM
HEAD STYLE	HEXAGON
THREAD SERIES DESIGNATOR	UNC
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	20
THREAD CLASS	2A
MATERIAL DOCUMENT AND CLASSIFICATION	SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-Z-325,TYPE 3,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	23.0 ROCKWELL C MINIMUM AND
	32.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	120000 POUNDS PER SQUARE INCH
HEAD HEIGHT	0.150 INCHES MINIMUM AND
	0.163 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.425 INCHES MINIMUM AND
	0.437 INCHES MAXIMUM
GRIP LENGTH	0.125 INCHES NOMINAL
FEATURES PROVIDED	FINISHED HEAD
NONDEFINITIVE SPEC/STD DATA	2 TYPE AND
	C5 STYLE
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	81348
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	FF-S-85C TY II STY 10P GR 5
MANUFACTURERS CODE	81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MILB857GRADE4TYPE2

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