5305-00-985-0860, SCREW,EXTERNALLY RELIEVED BODY

5305-00-985-0861 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-00-985-0860

Federal Supply Class:
5305

National Item Identification Number:
009850860

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:

0N096838-1	98230	NATIONAL SECURITY AGENCY
0N124097-1	98230	NATIONAL SECURITY AGENCY

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.256 INCHES MINIMUM AND 1.296 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	1.506 INCHES MINIMUM AND 1.526 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.090 INCHES MINIMUM AND 0.094 INCHES MAXIMUM
HEAD DIAMETER	0.235 INCHES NOMINAL
HEAD HEIGHT	0.145 INCHES MINIMUM AND 0.205 INCHES MAXIMUM
HEAD STYLE	FLAT CHAMFER
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 305 OVERALL
NOMINAL THREAD DIAMETER	0.138 INCHES
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD LENGTH	0.230 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
THREAD CLASS	2A
THREAD DIRECTION	RIGHT-HAND
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	32

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