5305-01-010-6970 SCREW,EXTERNALLY RELIEVED BODY Index 5305-01-010-6973 SCREW,CAP,SOCKET HEAD

National Stock Number:
5305-01-010-6971

Federal Supply Class:
5305

National Item Identification Number:
010106971

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:
SMB651375-180063US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER1.300 INCHES NOMINAL FIRST HOLE
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER1.160 INCHES NOMINAL
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER1.520 INCHES NOMINAL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY2
FASTENER LENGTH2.470 INCHES NOMINAL
FIRST DIAMETER FROM HEAD0.170 INCHES MINIMUM AND 0.175 INCHES MAXIMUM
HEAD DIAMETER0.420 INCHES NOMINAL
HEAD HEIGHT0.250 INCHES NOMINAL
HEAD STYLEKNURLED NO. 4
INTERNAL DRIVE STYLESLOT
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 303 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
SECOND DIAMETER FROM HEAD0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM
SHANK UNTHREADED HOLE DIAMETER0.094 INCHES MINIMUM AND 0.097 INCHES MAXIMUM FIRST HOLE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,FINISH E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.700 INCHES NOMINAL
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)


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