4470-00-209-7422 PLATE,LIFTING Index 5360-00-209-7432 SPRING,HELICAL,COMPRESSION

National Stock Number:
5310-00-209-7431

Federal Supply Class:
5310

National Item Identification Number:
002097431

Description:
WASHER,FLAT

Detail:
A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items.


Manufacturer Information:
57250502032HOLLINGSWORTH JOHN R CO
57250511449TURBO POWER & MARINE SYSTEM INC SUB OF UNITED TECHNOLOGIES CORP
5725051J4P3PARADIGM MANCHESTER INC.
57250526065PARMAC INC
57250526795A B A INDUSTRIES INC
5725052T918ALCO MACHINE CO INC
57250530201TREGO INC
57250532746PERRY C M AND CO INC
57250562224SATELLITE AEROSPACE, INCORPORATED
57250577445RTX CORPORATION
57250582001PCX AEROSTRUCTURES, LLC


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.270 INCHES MINIMUM AND 0.290 INCHES MAXIMUM
OVERALL DIAMETER0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5518 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 301 OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE FINISH63.0 MICROINCHES BOTTOM
SURFACE FINISH63.0 MICROINCHES TOP
THICKNESS0.019 INCHES MINIMUM AND 0.021 INCHES MAXIMUM


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