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National Stock Number:
5305-01-578-4408
Federal Supply Class:
5305
National Item Identification Number:
015784408
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:
| ST3M560-7 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M560-7 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M560-7 | 76301 | THE BOEING COMPANY | | ST3M560-7 | 89305 | SIMMONDS PRECISION PRODUCTS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.470 INCHES MINIMUM AND | | 0.500 INCHES MAXIMUM | | FASTENER LENGTH | 0.632 INCHES MINIMUM AND | | 0.675 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | PAN | | HEAD DIAMETER | 0.473 INCHES MINIMUM AND | | 0.492 INCHES MAXIMUM | | HEAD HEIGHT | 0.162 INCHES MINIMUM AND | | 0.175 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,PAN HEAD,CRES,BODY RELIEVED |
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