5306-01-255-1020, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-01-255-1020

Federal Supply Class:
5306

National Item Identification Number:
012551020

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:

2797921-5

55972

HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.170 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FOURTH DIAMETER	1.387 INCHES MINIMUM AND 1.403 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.770 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	1.005 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	1.387 INCHES MINIMUM AND 1.403 INCHES MAXIMUM
FEATURES PROVIDED	FINISHED HEAD
FIRST DIAMETER FROM HEAD	0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
FOURTH DIAMETER FROM HEAD	0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
HARDNESS RATING	29.0 ROCKWELL C MINIMUM OVERALL AND 37.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.223 INCHES MINIMUM AND 0.243 INCHES MAXIMUM
HEAD STYLE	HEXAGON
MATERIAL DOCUMENT AND CLASSIFICATION	BMS2S143,CAGEC 55972 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL CORROSION RESISTING OVERALL
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL THREAD DIAMETER	0.312 INCHES
SECOND DIAMETER FROM HEAD	0.261 INCHES MINIMUM AND 0.265 INCHES MAXIMUM
SPECIAL FEATURES	DRY FILM LUBRICATE TO MC AIR PS18021
WIDTH BETWEEN FLATS	0.545 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.390 INCHES NOMINAL
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNF

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