5305-00-253-8253, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-253-8253

Federal Supply Class:
5305

National Item Identification Number:
002538253

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:

0N047561	98230	NATIONAL SECURITY AGENCY
3111-14-8	97539	APM HEXSEAL CORP

Techincal Specification:

THREAD SERIES DESIGNATOR	UNC
NOMINAL THREAD DIAMETER	0.164 INCHES
THREAD QUANTITY PER INCH	32
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.183 INCHES MINIMUM AND
	0.223 INCHES MAXIMUM
FASTENER LENGTH	0.490 INCHES MINIMUM AND
	0.510 INCHES MAXIMUM
MATERIAL	STEEL CORROSION RESISTING OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HEAD STYLE	WATERTIGHT
HEAD DIAMETER	0.334 INCHES MINIMUM AND
	0.354 INCHES MAXIMUM
HEAD HEIGHT	0.105 INCHES MINIMUM AND
	0.125 INCHES MAXIMUM
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FIRST DIAMETER FROM HEAD	0.136 INCHES NOMINAL
SECOND DIAMETER FROM HEAD	0.133 INCHES MINIMUM AND
	0.139 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	0.052 INCHES MINIMUM AND
	0.072 INCHES MAXIMUM
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER	0.287 INCHES MINIMUM AND
	0.307 INCHES MAXIMUM
SPECIAL FEATURES	FURNISHED WITH 1 SILICONE RUBBER O-RING
THE MANUFACTURERS DATA
MANUFACTURERS CODE	97539
DESIGN CONTROL REFERENCE	3111-14-8

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