5306-99-139-1921, BOLT,EXTERNALLY RELIEVED BODY

5306-99-139-1919 BOLT,MACHINE

5365-99-139-1925 PLUG,SCREWED

National Stock Number:
5306-99-139-1921

Federal Supply Class:
5306

National Item Identification Number:
991391921

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:

STD520-3	K1464	GOODRICH CONTROL SYSTEMS LTD T/A GOODRICH ENGINE CONTROL SYSTEMS
STD520-3	U4287	ROLLS-ROYCE CONTROLS AND DATA SERVICES LIMITED

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.161 INCHES MINIMUM AND 0.169 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.049 INCHES MINIMUM AND 0.069 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	0.472 INCHES MINIMUM AND 0.484 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.421 INCHES MINIMUM AND 0.441 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.1575 INCHES MINIMUM AND 0.1606 INCHES MAXIMUM
HEAD HEIGHT	0.197 INCHES MINIMUM AND 0.209 INCHES MAXIMUM
HEAD STYLE	HEXAGON EXTENDED WASHER
MATERIAL DOCUMENT AND CLASSIFICATION	BS HR650 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.190 INCHES
WIDTH BETWEEN FLATS	0.305 INCHES MINIMUM AND 0.314 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.266 INCHES NOMINAL
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNJF

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