5306-01-129-3331, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-01-129-3331

Federal Supply Class:
5306

National Item Identification Number:
011293331

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:

65391-11740-102

78286

SIKORSKY AIRCRAFT CORPORATION

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.625 INCHES
THREAD QUANTITY PER INCH	18
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.775 INCHES NOMINAL
FASTENER LENGTH	8.050 INCHES MINIMUM AND
	8.060 INCHES MAXIMUM
MATERIAL	STEEL COMP 4340 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	SILVER OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	39.0 ROCKWELL C MINIMUM AND
	43.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	180000 POUNDS PER SQUARE INCH
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.370 INCHES MINIMUM AND
	0.380 INCHES MAXIMUM
WIDTH BETWEEN FLATS	1.090 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FIRST DIAMETER FROM HEAD	0.625 INCHES NOMINAL
SECOND DIAMETER FROM HEAD	0.500 INCHES MINIMUM AND
	0.510 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.625 INCHES MINIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.875 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	5.160 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	6.905 INCHES NOMINAL
THE MANUFACTURERS DATA
MANUFACTURERS CODE	78286
DESIGN CONTROL REFERENCE	65391-11740-102

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