5305-01-144-7379, SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-144-7379

Federal Supply Class:
5305

National Item Identification Number:
011447379

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:

SM-B-593081

80063

US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.370 INCHES NOMINAL1.370 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	11
FASTENER LENGTH	1.750 INCHES NOMINAL1.750 INCHES NOMINAL
FIRST DIAMETER FROM HEAD	0.180 INCHES NOMINAL0.180 INCHES NOMINAL
HEAD DIAMETER	0.620 INCHES NOMINAL0.620 INCHES NOMINAL
HEAD HEIGHT	0.250 INCHES NOMINAL0.250 INCHES NOMINAL
HEAD STYLE	KNURLED NO. 4KNURLED NO. 4
INTERNAL DRIVE STYLE	SLOTSLOT
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALLQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES0.250 INCHES
SPECIAL FEATURES	MEDIUM STRAIGHT KNURLMEDIUM STRAIGHT KNURL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALLMIL-F-14072 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND CADMIUM AND CHROMATE OVERALLCHROMATE OVERALL
THREAD CLASS	2A2A
THREAD DIRECTION	RIGHT-HANDRIGHT-HAND
THREAD LENGTH	0.380 INCHES NOMINAL0.380 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH	2020

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