5306-00-799-7877, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-799-7877

Federal Supply Class:
5306

National Item Identification Number:
007997877

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:

8259128	24617	GENERAL MOTORS CORP
8259128	39VG9	PROGRESS RAIL LOCOMOTIVE INC.
8259128	72915	GENERAL MOTORS CORP ELECTRO-MOTIVE DIV

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.187 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.500 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FASTENER LENGTH	2.781 INCHES MINIMUM AND 2.843 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.493 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
HARDNESS RATING	20.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.365 INCHES MINIMUM AND 0.386 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL	STEEL COMP 3135 OVERALL
MINIMUM TENSILE STRENGTH	133000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.500 INCHES
SECOND DIAMETER FROM HEAD	0.401 INCHES MINIMUM AND 0.411 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	1.312 INCHES MINIMUM AND 1.500 INCHES MAXIMUM
THREAD QUANTITY PER INCH	20
THREAD SERIES DESIGNATOR	UNF

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