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National Stock Number:
5305-00-537-1302
Federal Supply Class:
5305
National Item Identification Number:
005371302
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:
| 371-90B | 89944 | ELBITAMERICA, INC. |
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Techincal Specification:
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.021 INCHES MINIMUM AND 0.029 INCHES MAXIMUM | | COUNTERSINK ANGLE | 82.0 DEGREES NOMINAL | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | FASTENER LENGTH | 0.110 INCHES NOMINAL | | FIRST DIAMETER FROM HEAD | 0.058 INCHES MINIMUM AND 0.063 INCHES MAXIMUM | | HEAD DIAMETER | 0.159 INCHES MINIMUM AND 0.164 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY OVERALL | | NOMINAL THREAD DIAMETER | 0.086 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.051 INCHES MINIMUM AND 0.055 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 64 | | THREAD SERIES DESIGNATOR | UNF |
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