5306-01-232-5090, BOLT,EXTERNALLY RELIEVED BODY

5306-01-232-5091 BOLT,INTERNALLY RELIEVED BODY

National Stock Number:
5306-01-232-5090

Federal Supply Class:
5306

National Item Identification Number:
012325090

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:

L6311003-003	43999	THE BOEING COMPANY
L6311003-003	80378	TRIUMPH AEROSTRUCTURES, LLC

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.250 INCHES
THREAD QUANTITY PER INCH	28
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.396 INCHES NOMINAL
FASTENER LENGTH	0.956 INCHES NOMINAL
MATERIAL	IRON ALLOY 660 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLE	ROUND W/WRENCH FLATS CHAMFERED
HEAD DIAMETER	0.760 INCHES MINIMUM AND
	0.790 INCHES MAXIMUM
HEAD HEIGHT	0.250 INCHES NOMINAL
WIDTH BETWEEN FLATS	0.625 INCHES NOMINAL
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.850 INCHES NOMINAL FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND
	0.086 INCHES MAXIMUM FIRST HOLE
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FIRST DIAMETER FROM HEAD	0.453 INCHES NOMINAL
SECOND DIAMETER FROM HEAD	0.488 INCHES MINIMUM AND
	0.498 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.190 INCHES MINIMUM AND
	0.200 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.094 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.466 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.560 INCHES NOMINAL
FEATURES PROVIDED	FINISHED HEAD

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