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		                             National Stock Number: 5305-00-660-2178
  Federal Supply Class: 5305
  National Item Identification Number: 006602178
  Description: SCREW,MACHINE
  Detail: An externally threaded fastener whose threaded portion is of one nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal 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. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; and SCREW, CAP SOCKET HEAD. 
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  Manufacturer Information:
 | FFS92 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |   
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  Techincal Specification:
 | FASTENER LENGTH | 1.000 INCHES NOMINAL |  | HEAD DIAMETER | 0.490 INCHES MINIMUM AND 0.518 INCHES MAXIMUM |  | HEAD HEIGHT | 0.194 INCHES MINIMUM AND 0.211 INCHES MAXIMUM |  | HEAD STYLE | FILLISTER |  | NOMINAL THREAD DIAMETER | 0.312 INCHES |  | NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND 5S STYLE |  | INTERNAL DRIVE STYLE | SLOT |  | MINIMUM TENSILE STRENGTH | 55000 POUNDS PER SQUARE INCH |  | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE |  | SCREW MATERIAL | COPPER ALLOY |  | THREAD CLASS | 2A |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 1.000 INCHES MINIMUM |  | THREAD QUANTITY PER INCH | 18 |  | THREAD SERIES DESIGNATOR | UNC |   
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