5306-00-687-7388, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-687-7388

Federal Supply Class:
5306

National Item Identification Number:
006877388

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:

383583	77445	RTX CORPORATION
383583	80539	SPS TECHNOLOGIES, LLC
383583	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
383583	93907	TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.120 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.250 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.454 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FASTENER LENGTH	1.230 INCHES MINIMUM AND 1.250 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER	0.550 INCHES MINIMUM AND 0.570 INCHES MAXIMUM
HEAD HEIGHT	0.180 INCHES MINIMUM AND 0.200 INCHES MAXIMUM
HEAD STYLE	ROUND W/WRENCH FLATS
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 6304 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 601 OVERALL
MINIMUM TENSILE STRENGTH	142000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.312 INCHES
NONSTANDARD THREAD PITCH DIAMETER	+0.2797 TO 0.2824 INCHES
SECOND DIAMETER FROM HEAD	0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.300 INCHES NOMINAL
SURFACE TREATMENT	COPPER AND CADMIUM OVERALL
THIRD DIAMETER FROM HEAD	0.309 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.673 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	24

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