5306-01-185-5857, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-01-185-5857

Federal Supply Class:
5306

National Item Identification Number:
011855857

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:

2797921-2	55972	HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS
2797921-2	K0662	LEONARDO MW LTD

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.312 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.372 INCHES MINIMUM AND
	0.408 INCHES MAXIMUM
FASTENER LENGTH	1.387 INCHES MINIMUM AND
	1.403 INCHES MAXIMUM
MATERIAL	STEEL COMP 440F OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	55.0 ROCKWELL C MINIMUM OVERALL
HEAD STYLE	HEXAGON
HEAD HEIGHT	0.223 INCHES MINIMUM AND
	0.243 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.555 INCHES MINIMUM AND
	0.562 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FIRST DIAMETER FROM HEAD	0.160 INCHES MINIMUM AND
	0.180 INCHES MAXIMUM
SECOND DIAMETER FROM HEAD	0.760 INCHES MINIMUM AND
	0.780 INCHES MAXIMUM
THIRD DIAMETER FROM HEAD	0.995 INCHES MINIMUM AND
	1.015 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.261 INCHES MINIMUM AND
	0.265 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.303 INCHES MINIMUM AND
	0.312 INCHES MAXIMUM
SPECIAL FEATURES	PAINT ONE COAT OF PRIMER TO MIL-P-23377 OR MMS 425 AND ONE COAT OF LUSTERLESS MATT BLACK NO. 3708 FED STD 595 TO TTE 527 ON HEAD OF SCREW ONLY
THE MANUFACTURERS DATA
MANUFACTURERS CODE	55972
DESIGN CONTROL REFERENCE	2797921-2

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