5306-01-381-1577, BOLT,INTERNALLY RELIEVED BODY

National Stock Number:
5306-01-381-1577

Federal Supply Class:
5306

National Item Identification Number:
013811577

Description:
BOLT,INTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose external threaded portion is of one nominal diameter. It has a concentric hole along the longitudinal centerline which may extend a part or the full length of the bolt. The concentric hole along the centerline may be counterbored and/or internally threaded at the head end or the bolt end. The head is designed to be held or driven by an external and/or internal driver. For items having a hole(s) perpendicular to the axis which meet the concentric hole along the longitudinal centerline, see BOLT, FLUID PASSAGE.

Manufacturer Information:

17P6W8247-505

88277

THE BOEING COMPANY

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.500 INCHES
THREAD QUANTITY PER INCH	20
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.630 INCHES MINIMUM AND
	0.665 INCHES MAXIMUM
FASTENER LENGTH	2.494 INCHES MINIMUM AND
	2.524 INCHES MAXIMUM
MATERIAL	NICKEL ALLOY 718 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATOR	COUNTERBORE THREADED
SHOULDER DIAMETER	0.7477 INCHES MINIMUM AND
	0.7487 INCHES MAXIMUM
SHOULDER LENGTH	1.712 INCHES MINIMUM AND
	1.722 INCHES MAXIMUM
CONCENTRIC HOLE DEPTH	1.687 INCHES MINIMUM AND
	1.712 INCHES MAXIMUM
CONCENTRIC HOLE DIAMETER	0.107 INCHES MINIMUM AND
	0.114 INCHES MAXIMUM
THREAD SERIES	UNF HEAD
NOMINAL THREAD SIZE	0.250 INCHES HEAD
THREADS PER INCH	28 HEAD
INTERNAL THREAD CLASS	3B HEAD
INTERNAL THREAD DIRECTION	RIGHT-HAND HEAD
INTERNAL THREAD LENGTH	0.250 INCHES NOMINAL HEAD
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.375 INCHES MINIMUM AND
	0.390 INCHES MAXIMUM
WIDTH BETWEEN FLATS	1.052 INCHES MINIMUM AND
	1.064 INCHES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.234 INCHES MINIMUM AND
	2.244 INCHES MAXIMUM THREADS
SHANK UNTHREADED HOLE DIAMETER	0.107 INCHES MINIMUM AND
	0.114 INCHES MAXIMUM THREADS
SPECIAL FEATURES	SECOND HOLD IN THDS, 90 DEGREES APART; 32 MICRO-INCH FINISH ON SHOULDER AND THRD RELIEF

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