5305-00-921-6157, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-921-6157

Federal Supply Class:
5305

National Item Identification Number:
009216157

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:

11010373	19200	US ARMY ARDEC RDECOM
11010373	19205	SPRINGFIELD ARMORY

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.500 INCHES MINIMUM AND 1.503 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	2.215 INCHES MINIMUM AND 2.225 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.220 INCHES MINIMUM AND 0.235 INCHES MAXIMUM
HEAD DIAMETER	0.595 INCHES MINIMUM AND 0.615 INCHES MAXIMUM
HEAD HEIGHT	0.163 INCHES MINIMUM AND 0.178 INCHES MAXIMUM
HEAD STYLE	PAN NO. 2
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL
MATERIAL	STEEL COMP 1137 OR STEEL COMP 1141 OVERALL
NOMINAL THREAD DIAMETER	0.312 INCHES
SURFACE TREATMENT	PHOSPHATE OVERALL
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.509 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
THREAD QUANTITY PER INCH	18
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)

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