5306-01-363-8471, BOLT,EXTERNALLY RELIEVED BODY

5306-01-363-8472 BOLT,INTERNALLY RELIEVED BODY

National Stock Number:
5306-01-363-8471

Federal Supply Class:
5306

National Item Identification Number:
013638471

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:

122-2422421 PC	80064	NAVAL SHIP SYSTEMS COMMAND
122-2422421 PIECE 26	80064	NAVAL SHIP SYSTEMS COMMAND

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	1.250 INCHES
THREAD QUANTITY PER INCH	12
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
FASTENER LENGTH	9.680 INCHES NOMINAL
MATERIAL	STEEL COMP 4340 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-16974 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
HARDNESS RATING	30.0 ROCKWELL C MINIMUM AND
	34.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	165000 POUNDS PER SQUARE INCH
HEAD STYLE	HEXAGON EXTENDED WASHER
HEAD HEIGHT	1.500 INCHES NOMINAL
WIDTH BETWEEN FLATS	2.244 INCHES MINIMUM AND
	2.250 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	2.750 INCHES NOMINAL
EXTENDED WASHER THICKNESS	0.250 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FIRST DIAMETER FROM HEAD	1.988 INCHES MINIMUM AND
	1.990 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD	1.626 INCHES MINIMUM AND
	1.628 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	1.988 INCHES MINIMUM AND
	1.990 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	1.6222 INCHES MINIMUM AND
	1.6238 INCHES MAXIMUM
FIFTH DIAMETER FROM HEAD	1.126 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.250 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.526 INCHES MINIMUM AND
	0.536 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.590 INCHES MINIMUM AND
	0.620 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	8.120 INCHES NOMINAL
SPECIAL FEATURES	MACHINE TOOTH SPLINE,WITH 12 TEETH,ON FOURTH DIA. FROM HEAD,1.275 IN. MINOR DIA.,1.6238 IN. MAJOR DIA. 2.120 IN. LONG,STARTING 6.00 IN. FROM BEARING SURFACE OF HEAD TO 8.120 IN. FROM BEARING SURFACE OF HEAD

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