5306-99-738-9713, BOLT,EXTERNALLY RELIEVED BODY

5306-99-738-9680 BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-99-738-9713

Federal Supply Class:
5306

National Item Identification Number:
997389713

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:

B496738

K0378

ROLLS-ROYCE PLC

Techincal Specification:

DISTANCE FROM CENTERLINE TO FLAT	0.249 INCHES MINIMUM AND 0.254 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER	3.450 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.230 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	3.080 INCHES MINIMUM AND 3.120 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.960 INCHES MINIMUM AND 1.000 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.240 INCHES MINIMUM AND 1.280 INCHES MAXIMUM
CRITICALITY CODE JUSTIFICATION	AAWC AND AAWE AND AAWG
FASTENER LENGTH	3.990 INCHES MINIMUM AND 4.010 INCHES MAXIMUM
FIFTH DIAMETER FROM HEAD	0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
HEAD HEIGHT	0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM
HEAD DIAMETER	0.667 INCHES MINIMUM AND 0.687 INCHES MAXIMUM
HEAD STYLE	DEE CHAMFER
MATERIAL DOCUMENT AND CLASSIFICATION	BS HR650 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE
MATERIAL	STEEL
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
SPECIAL FEATURES	MODIFIED THD 0.2435/0.2480 IN. MAJOR DIA;UNJF MOD THD
THIRD DIAMETER FROM HEAD	0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.550 INCHES NOMINAL
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNJF

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