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National Stock Number:
5305-01-433-9800
Federal Supply Class:
5305
National Item Identification Number:
014339800
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:
| 3168813-0019 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 4042 | 04729 | UNICORP. |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.303 INCHES MINIMUM AND | | 0.313 INCHES MAXIMUM | | FASTENER LENGTH | 1.000 INCHES NOMINAL | | MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-14072-E300 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | KNURLED NO. 1 | | HEAD DIAMETER | 0.495 INCHES MINIMUM AND | | 0.505 INCHES MAXIMUM | | HEAD HEIGHT | 0.546 INCHES MINIMUM AND | | 0.578 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | SLOT | | POINT STYLE | CONE | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 3 | | FIRST DIAMETER FROM HEAD | 0.170 INCHES MINIMUM AND | | 0.180 INCHES MAXIMUM | | SECOND DIAMETER FROM HEAD | 0.250 INCHES NOMINAL | | THIRD DIAMETER FROM HEAD | 0.160 INCHES MINIMUM AND | | 0.175 INCHES MAXIMUM | | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.798 INCHES MINIMUM AND | | 0.833 INCHES MAXIMUM |
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