5306-00-278-9423, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-278-9423

Federal Supply Class:
5306

National Item Identification Number:
002789423

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:

6829919	17328	UNITED PRECISION PRODUCTS CO., INC.
6829919	24617	GENERAL MOTORS CORP
6829919	63005	ROLLS-ROYCE CORPORATION
6829919	73342	ALLISON TRANSMISSION INC

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.760 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.590 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	2.440 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	1.260 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIFTH DIAMETER	2.940 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	5
FASTENER LENGTH	3.920 INCHES NOMINAL
FIFTH DIAMETER FROM HEAD	0.751 INCHES MINIMUM AND 0.752 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.751 INCHES MINIMUM AND 0.752 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.690 INCHES NOMINAL
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL	STEEL COMP 4340 OVERALL
NOMINAL THREAD DIAMETER	0.750 INCHES
SECOND DIAMETER FROM HEAD	0.690 INCHES NOMINAL
SPECIAL FEATURES	TWO SLOTS 0.062 IN. BY 0.145 IN. BY 1.010 IN. EQUALLY SPACED VERTICAL TO THD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 2481 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PHOSPHATE OVERALL
THIRD DIAMETER FROM HEAD	0.751 INCHES MINIMUM AND 0.752 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.826 INCHES MINIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	16
WIDTH BETWEEN FLATS	1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM

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