5306-00-672-6212, BOLT,EXTERNALLY RELIEVED BODY

National Stock Number:
5306-00-672-6212

Federal Supply Class:
5306

National Item Identification Number:
006726212

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:

327B461P1	24446	GENERAL ELECTRIC COMPANY
327B461P1	99207	GENERAL ELECTRIC COMPANY

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.052 INCHES MINIMUM AND 0.062 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.188 INCHES MINIMUM AND 0.213 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	0.428 INCHES MINIMUM AND 0.443 INCHES MAXIMUM
EXTENDED WASHER THICKNESS	0.060 INCHES MINIMUM AND 0.070 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	2
FASTENER LENGTH	0.640 INCHES MINIMUM AND 0.660 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.205 INCHES MINIMUM AND 0.226 INCHES MAXIMUM
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.320 INCHES MINIMUM AND 0.340 INCHES MAXIMUM
HEAD STYLE	DOUBLE HEXAGON W/HOLE
MATERIAL DOCUMENT AND CLASSIFICATION	B50R270 FSCM 99207 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SECOND DIAMETER FROM HEAD	0.265 INCHES MINIMUM AND 0.266 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.304 INCHES MINIMUM AND 0.313 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	AMS 2403 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	NICKEL OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.370 INCHES MINIMUM AND 0.390 INCHES MAXIMUM
THREAD QUANTITY PER INCH	28
THREAD SERIES DESIGNATOR	UNF

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