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National Stock Number:
5305-01-186-1206
Federal Supply Class:
5305
National Item Identification Number:
011861206
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:
| M86K0005-1 | 12464 | MCDONNELL DOUGLAS CORP MCDONNELL DOUGLAS ELECTRONIC SYSTEMS CO | | M86K0005-1 | 14248 | HARLOW AEROSTRUCTURES, LLC | | M86K0005-1 | 19133 | MCDONNELL DOUGLAS CORP MCDONNELL DOUGLAS AEROSPACE OPNS WEST |
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Techincal Specification:
| CHAMFER ANGLE | 45.0 DEGREES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.870 INCHES NOMINAL | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 | | FASTENER LENGTH | 1.290 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.150 INCHES NOMINAL | | HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM | | HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | HEXAGON | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SECOND DIAMETER FROM HEAD | 0.190 INCHES NOMINAL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.420 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNRF | | WIDTH ACROSS FLATS | 0.157 INCHES NOMINAL |
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