5306-00-870-3007, BOLT,EXTERNALLY RELIEVED BODY

5306-00-870-3010 BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-870-3007

Federal Supply Class:
5306

National Item Identification Number:
008703007

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:

6863079	73342	ALLISON TRANSMISSION INC
6863079	K0680	ROLLS-ROYCE AIRLINES
BLT2122	K0680	ROLLS-ROYCE AIRLINES

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.180 INCHES MINIMUM AND 0.220 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	3.200 INCHES MINIMUM AND 3.260 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.735 INCHES MINIMUM AND 1.775 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	2.050 INCHES MINIMUM AND 2.090 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	4
FASTENER LENGTH	3.990 INCHES MINIMUM AND 4.010 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.244 INCHES MINIMUM AND 0.249 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL	STEEL CORROSION RESISTING OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
NONSTANDARD THREAD PITCH DIAMETER	+0.2212 TO 0.2238 INCHES
SECOND DIAMETER FROM HEAD	0.190 INCHES MINIMUM AND 0.195 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
THREAD DIRECTION	RIGHT-HAND
THIRD DIAMETER FROM HEAD	0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
THREAD LENGTH	0.750 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	28

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