5306-00-652-6346 BOLT,EXTERNALLY RELIEVED BODY Index 5305-00-652-6348 SCREW,MACHINE

National Stock Number:
5306-00-652-6347

Federal Supply Class:
5306

National Item Identification Number:
006526347

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:
875926219207U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.445 INCHES MINIMUM AND 1.450 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER2.312 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER2.500 INCHES NOMINAL
CRITICALITY CODE JUSTIFICATIONAAWC
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY3
FASTENER LENGTH2.500 INCHES NOMINAL
FIRST DIAMETER FROM HEAD0.6185 INCHES MINIMUM AND 0.6235 INCHES MAXIMUM
HARDNESS RATING29.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.328 INCHES NOMINAL
HEAD STYLEHEXAGON
MATERIALSTEEL COMP 1010 OR STEEL COMP 1015 OVERALL
NOMINAL THREAD DIAMETER0.500 INCHES
SECOND DIAMETER FROM HEAD0.500 INCHES NOMINAL
WIDTH BETWEEN FLATS0.750 INCHES NOMINAL
SURFACE TREATMENTPHOSPHATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THIRD DIAMETER FROM HEAD0.375 INCHES NOMINAL
THREAD LENGTH0.862 INCHES MINIMUM AND 0.867 INCHES MAXIMUM
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNF


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