5305-01-145-8287, SCREW,EXTERNALLY RELIEVED BODY

5305-01-145-8286 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5305-01-145-8287

Federal Supply Class:
5305

National Item Identification Number:
011458287

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:

12275866	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
12275866-2	19207	U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
5305011458287	A00AM	E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE
5305011458287	SCY13	E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE

Techincal Specification:

DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER	1.190 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY	1
FASTENER LENGTH	1.945 INCHES MINIMUM AND 1.961 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD	0.495 INCHES NOMINAL
HARDNESS RATING	28.0 ROCKWELL C MINIMUM OVERALL AND 33.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT	0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM
HEAD STYLE	DISHED HEXAGON
INTERNAL DRIVE STYLE	W/O INTERNAL DRIVE
MATERIAL DOCUMENT AND CLASSIFICATION	STM-A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR STM-A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 8640 OVERALL OR STEEL COMP 4140 OVERALL
PROPRIETARY CHARACTERISTICS	PACS
NOMINAL THREAD DIAMETER	0.3125 INCHES
WIDTH BETWEEN FLATS	0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,CLASS 3,TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL OR QQ-Z-325,TYPE 1,CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL OR ZINC OVERALL
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.560 INCHES NOMINAL
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNF

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