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National Stock Number:
5305-01-190-9074
Federal Supply Class:
5305
National Item Identification Number:
011909074
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:
| 901-14 | 13669 | TESCOM CORP | | 901-14 | 28968 | CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. | | 901-14CP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG | | 901-14CP | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH |
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Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | ZZZY | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FASTENER LENGTH | 0.501 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.178 INCHES MINIMUM AND 0.182 INCHES MAXIMUM | | HEAD HEIGHT | 0.187 INCHES NOMINAL | | HEAD STYLE | CROWNED HEXAGON | | INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-N-286,CL B,HEX BAR FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL ALLOY OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | POINT DIAMETER | 0.156 INCHES NOMINAL | | POINT STYLE | FLAT | | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.250 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | | WIDTH BETWEEN FLATS | 0.375 INCHES NOMINAL |
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