5306-00-121-7922, BOLT,MACHINE

National Stock Number:
5306-00-121-7922

Federal Supply Class:
5306

National Item Identification Number:
001217922

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:

AS9556	0U583	SAE INTERNATIONAL
AS9556	81343	SOCIETY OF AUTOMOTIVE ENGINEERS INC
MS9556-29	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

CRITICALITY CODE JUSTIFICATION	FEAT
EXTENDED WASHER DIAMETER	0.375 INCHES NOMINAL
EXTENDED WASHER THICKNESS	0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM
FASTENER LENGTH	2.125 INCHES NOMINAL
FEATURES PROVIDED	FINISHED HEAD
GRIP LENGTH	1.435 INCHES MINIMUM AND 1.495 INCHES MAXIMUM
HARDNESS RATING	248.0 BRINELL STANDARD MINIMUM AND 341.0 BRINELL STANDARD MAXIMUM OVERALL
HEAD HEIGHT	0.260 INCHES NOMINAL
HEAD STYLE	DOUBLE HEXAGON W/HOLE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	IRON ALLOY 660 OVERALL
MINIMUM TENSILE STRENGTH	130000 POUNDS PER SQUARE INCH
MINIMUM YIELD STRENGTH	85000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.190 INCHES
SPECIAL FEATURES	THIS BOLD HOLDS TOGETHER BAND SEGMENT & LAMINATED SHIM ON FRONT FAN DUCT (AMS 5731 HEAT RESISTANT STEEL, 2.405 INCH LENGTH, .385 INCH DIAMETER) USE ON THE 220 ENGINE. FAILURE OF BOLT WOULD NOT CAUSE AN ENGINE SHUT DOWN OR CATASTROPHIC FAILURE, FAILURE WOULD RESULT IN MAINTENANCE TO REMOVE & REPLACE BROKEN BOLT
WIDTH BETWEEN FLATS	0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE FINISH	32.0 MICROINCHES THREADS
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.630 INCHES MINIMUM AND 0.690 INCHES MAXIMUM
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNJF

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