5305-00-522-2437, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-522-2437

Federal Supply Class:
5305

National Item Identification Number:
005222437

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:

342662	10001	NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER
5222437	19206	ARMY, UNITED STATES DEPARTMENT OF THE BUSINESS DEVELOPMENT DBA WATERVLIET ARSENAL

Techincal Specification:

THREAD SERIES DESIGNATOR	UNF
NOMINAL THREAD DIAMETER	0.375 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.328 INCHES MINIMUM
FASTENER LENGTH	0.750 INCHES NOMINAL
MATERIAL	STEEL OVERALL
SURFACE TREATMENT	PHOSPHATE OVERALL
HARDNESS RATING	152.0 BRINELL STANDARD MINIMUM AND
	219.0 BRINELL STANDARD MAXIMUM OVERALL
HEAD STYLE	PAN NO. 2
HEAD DIAMETER	0.563 INCHES NOMINAL
HEAD HEIGHT	0.125 INCHES NOMINAL
INTERNAL DRIVE STYLE	SLOT
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.594 INCHES NOMINAL FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.078 INCHES NOMINAL FIRST HOLE
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	3
FIRST DIAMETER FROM HEAD	0.313 INCHES NOMINAL
SECOND DIAMETER FROM HEAD	0.375 INCHES NOMINAL
THIRD DIAMETER FROM HEAD	0.281 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.063 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.359 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF THIRD DIAMETER	0.750 INCHES NOMINAL

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