5306-00-474-3503, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-474-3503

Federal Supply Class:
5306

National Item Identification Number:
004743503

Description:
BOLT,EXTERNALLY RELIEVED BODY

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercuts for thread relief). It is No. 10 (0.190 IN.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, INTERNAL WRENCHING and THUMBSCREW. See also SCREW, EXTERNALLY RELIEVED BODY.

Manufacturer Information:

5447	14451	SOON AIR CO
5447	55948	BOTOMAN MFG CO INC

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	28
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.302 INCHES NOMINAL
FASTENER LENGTH	1.375 INCHES MINIMUM AND
	1.395 INCHES MAXIMUM
MATERIAL	STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	29.0 ROCKWELL C MINIMUM AND
	34.0 ROCKWELL C MAXIMUM OVERALL
HEAD STYLE	DEE CHAMFER
HEAD DIAMETER	0.448 INCHES MINIMUM AND
	0.488 INCHES MAXIMUM
HEAD HEIGHT	0.125 INCHES NOMINAL
DISTANCE FROM CENTERLINE TO FLAT	0.146 INCHES MINIMUM AND
	0.166 INCHES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	1.295 INCHES MINIMUM AND
	1.315 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.077 INCHES MINIMUM AND
	0.082 INCHES MAXIMUM FIRST HOLE
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	4
FIRST DIAMETER FROM HEAD	0.249 INCHES MINIMUM AND
	0.250 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD	0.195 INCHES MINIMUM AND
	0.200 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.249 INCHES MINIMUM AND
	0.250 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.195 INCHES MINIMUM AND
	0.200 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.084 INCHES MINIMUM AND
	0.104 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.312 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.646 INCHES MINIMUM AND
	0.666 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	0.990 INCHES MINIMUM AND
	1.010 INCHES MAXIMUM
FEATURES PROVIDED	CASEHARDENED
ASKEWED HEAD ANGLE	30.0 DEGREES NOMINAL
THE MANUFACTURERS DATA
MANUFACTURERS CODE	55948
DESIGN CONTROL REFERENCE	5447

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