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National Stock Number: 5305-01-220-3090
Federal Supply Class: 5305
National Item Identification Number: 012203090
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.
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Manufacturer Information:
1291-163-2 | 72314 | BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. |
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Techincal Specification:
THREAD SERIES DESIGNATOR | UNC | NOMINAL THREAD DIAMETER | 0.138 INCHES | THREAD QUANTITY PER INCH | 32 | THREAD CLASS | 3A | THREAD DIRECTION | RIGHT-HAND | THREAD LENGTH | 0.220 INCHES NOMINAL | FASTENER LENGTH | 0.562 INCHES NOMINAL | MATERIAL | STEEL COMP 410 OVERALL | SURFACE TREATMENT | OXIDE OVERALL | HEAD STYLE | FLAT CHAMFER | HEAD DIAMETER | 0.218 INCHES MINIMUM AND | | 0.226 INCHES MAXIMUM | HEAD HEIGHT | 0.134 INCHES MINIMUM AND | | 0.138 INCHES MAXIMUM | INTERNAL DRIVE STYLE | HEXAGON | WIDTH ACROSS FLATS | 0.110 INCHES NOMINAL | HOLE CONFIGURATION STYLE | ROUND INTERNAL HEXAGON | HOLE TYPE | DRILLED | HOLE QUANTITY | 2 | HOLE DIAMETER | 0.033 INCHES MINIMUM AND | | 0.039 INCHES MAXIMUM | POINT STYLE | FLAT | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | FIRST DIAMETER FROM HEAD | 0.103 INCHES MINIMUM AND | | 0.107 INCHES MAXIMUM | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.342 INCHES NOMINAL |
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