4820-01-540-0218 VALVE,CHECK Index 6160-01-540-0220 COVER,BATTERY

National Stock Number:
5305-01-540-0219

Federal Supply Class:
5305

National Item Identification Number:
015400219

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:
7370016-319133MCDONNELL DOUGLAS CORP MCDONNELL DOUGLAS AEROSPACE OPNS WEST
7370016-376301THE BOEING COMPANY


Techincal Specification:
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
FASTENER LENGTH0.844 INCHES MINIMUM AND 0.875 INCHES MAXIMUM
FIRST DIAMETER FROM HEAD0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM
HEAD STYLEPAN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MATERIALSTEEL COMP 302 OVERALL OR STEEL COMP 304 OVERALL OR STEEL COMP 305 OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW EXTERNALLY RELIVED
PROPRIETARY CHARACTERISTICSPACS
NOMINAL THREAD DIAMETER0.164 INCHES
SPECIAL FEATURESMADE FROM MS51957-48
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.227 INCHES MINIMUM AND 0.297 INCHES MAXIMUM
THREAD QUANTITY PER INCH32
THREAD SERIES DESIGNATORUNC


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