5306-99-781-0295, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-99-781-0295

Federal Supply Class:
5306

National Item Identification Number:
997810295

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:

B490280	K0378	ROLLS-ROYCE PLC
B490280 ZZ	K0378	ROLLS-ROYCE PLC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER	1.440 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.432 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	1.110 INCHES MINIMUM AND 1.150 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.468 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.570 INCHES MINIMUM AND 0.610 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATION	AAWC AND AAWE AND AAWG
FASTENER LENGTH	2.260 INCHES MINIMUM AND 2.280 INCHES MAXIMUM
FIFTH DIAMETER FROM HEAD	0.3715 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.3715 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.295 INCHES MINIMUM AND 0.305 INCHES MAXIMUM
HEAD DIAMETER	0.915 INCHES MINIMUM AND 0.925 INCHES MAXIMUM
HEAD HEIGHT	0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLE	ROUND W/WRENCH FLATS CHAMFERED
MATERIAL DOCUMENT AND CLASSIFICATION	DTD 5066 MIL STD SINGLE MATERIAL RESPONSE
MATERIAL	STEEL
NOMINAL THREAD DIAMETER	0.375 INCHES
SECOND DIAMETER FROM HEAD	0.345 INCHES MINIMUM AND 0.350 INCHES MAXIMUM
SPECIAL FEATURES	SURFACE TREATMENT LOCATION 2ND & 4TH DIA
WIDTH BETWEEN FLATS	0.675 INCHES NOMINAL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	ROLLS ROYCE LTD RPS 170 MFR REF SINGLE TREATMENT RESPONSE
SURFACE TREATMENT	CADMIUM
THIRD DIAMETER FROM HEAD	0.3715 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.830 INCHES NOMINAL
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNJF

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