5305-00-307-1520, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-307-1520

Federal Supply Class:
5305

National Item Identification Number:
003071520

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:

7528255P036A	99971	LOCKHEED MARTIN CORP NAVAL ELECTRONICS & SURVEILLANCE SYSTEMS
7528255P36A	99971	LOCKHEED MARTIN CORP NAVAL ELECTRONICS & SURVEILLANCE SYSTEMS

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.322 INCHES MINIMUM AND 0.394 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	0.530 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.090 INCHES MINIMUM AND 0.100 INCHES MAXIMUM
HEAD DIAMETER	0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
HEAD HEIGHT	0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM
HEAD STYLE	PAN
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC 1ST MATERIAL RESPONSE OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 302 OR STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.138 INCHES
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.168 INCHES MINIMUM AND 0.208 INCHES MAXIMUM
THREAD CLASS	2A
THREAD SERIES DESIGNATOR	UNC
THREAD QUANTITY PER INCH	32

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