5306-00-870-3010 BOLT,EXTERNALLY RELIEVED BODY Index 5306-00-870-3016 BOLT,MACHINE

National Stock Number:
5306-00-870-3015

Federal Supply Class:
5306

National Item Identification Number:
008703015

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:
686308K0680ROLLS-ROYCE AIRLINES
686308173342ALLISON TRANSMISSION INC
BLT2124K0680ROLLS-ROYCE AIRLINES


Techincal Specification:
THREAD SERIES DESIGNATORUNF
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD QUANTITY PER INCH28
THREAD CLASS1A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.660 INCHES MINIMUM
FASTENER LENGTH3.640 INCHES MINIMUM AND
3.660 INCHES MAXIMUM
MATERIALSTEEL CORROSION RESISTING OVERALL
HARDNESS RATING36.0 ROCKWELL C MINIMUM AND
41.0 ROCKWELL C MAXIMUM OVERALL
HEAD STYLEHEXAGON
HEAD HEIGHT0.146 INCHES MINIMUM AND
0.166 INCHES MAXIMUM
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND
0.439 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY4
FIRST DIAMETER FROM HEAD0.244 INCHES MINIMUM AND
0.249 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD0.190 INCHES MINIMUM AND
0.195 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD0.249 INCHES MINIMUM AND
0.250 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD0.190 INCHES MINIMUM AND
0.195 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.190 INCHES MINIMUM AND
0.210 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.475 INCHES MINIMUM AND
1.515 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER1.715 INCHES MINIMUM AND
1.755 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER2.940 INCHES MINIMUM AND
3.000 INCHES MAXIMUM
THE MANUFACTURERS DATA
MANUFACTURERS CODE73342
DESIGN CONTROL REFERENCE6863081


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