5305-00-776-3889, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-776-3889

Federal Supply Class:
5305

National Item Identification Number:
007763889

Description:
SCREW,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 undercut for thread relief). It is No. 0 (0.060 IN.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below No. 10 (0.190 IN.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and multiple spline types) but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. See also BOLT, EXTERNALLY RELIEVED BODY and BOLT, INTERNAL WRENCHING.

Manufacturer Information:

327B491P8	24446	GENERAL ELECTRIC COMPANY
327B491P8	99207	GENERAL ELECTRIC COMPANY

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.065 INCHES MINIMUM AND 0.095 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
EXTENDED WASHER THICKNESS	0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM
FASTENER LENGTH	0.437 INCHES MINIMUM AND 0.457 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.116 INCHES MINIMUM AND 0.126 INCHES MAXIMUM
HARDNESS RATING	32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM
HEAD STYLE	DOUBLE HEXAGON W/HOLE
INTERNAL DRIVE STYLE	W/O INTERNAL DRIVE
MATERIAL DOCUMENT AND CLASSIFICATION	B50R270,FSCM 99207 MFR REF SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL OVERALL
NOMINAL THREAD DIAMETER	0.138 INCHES
WIDTH BETWEEN FLATS	0.181 INCHES MINIMUM AND 0.189 INCHES MAXIMUM
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.342 INCHES MINIMUM AND 0.392 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNF
THREAD QUANTITY PER INCH	40

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