5306-99-109-1264, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-99-109-1264

Federal Supply Class:
5306

National Item Identification Number:
991091264

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:

B378962	K0378	ROLLS-ROYCE PLC
B378962	K0680	ROLLS-ROYCE AIRLINES
B378962 ZZ	K0378	ROLLS-ROYCE PLC

Techincal Specification:

MATERIAL DOCUMENT AND CLASSIFICATION	BRISTOL SIDDELEY ENGINES LTD BSE-529 MFR REF SINGLE MATERIAL RESPONSE
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.431 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
STRENGTH GRADE DESIGNATION	ERR-030
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.500 INCHES NOMINAL
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNF
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.150 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.450 INCHES NOMINAL
CRITICALITY CODE JUSTIFICATION	AAWC
FASTENER LENGTH	1.950 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.2465 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM
HEAD HEIGHT	0.140 INCHES MINIMUM AND 0.150 INCHES MAXIMUM
HEAD STYLE	HEXAGON

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