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National Stock Number:
5305-00-487-0217
Federal Supply Class:
5305
National Item Identification Number:
004870217
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:
| PB50859-1 | 19315 | HONEYWELL INTL INC DEFENSE AVIONICS SYSTEMS FORMER BENDIX NAVIGATION AND CONTROL SYSTEMS | | PB50859-1 | 99251 | MISSION SYSTEMS DAVENPORT INC. |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.062 INCHES NOMINAL | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FASTENER LENGTH | 0.438 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM | | HEAD DIAMETER | 0.406 INCHES NOMINAL | | HEAD HEIGHT | 0.108 INCHES NOMINAL | | HEAD STYLE | BINDING | | INTERNAL DRIVE STYLE | TORQUE | | MATERIAL | COPPER ALLOY OVERALL | | NOMINAL THREAD DIAMETER | 0.164 INCHES | | SURFACE TREATMENT | OXIDE OVERALL | | SURFACE TREATMENT | ENAMEL HEAD | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.376 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 36 | | THREAD SERIES DESIGNATOR | UNF |
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