5325-01-561-9871 INSERT,PANEL FASTENER Index 1560-01-561-9873 STIFFENER,AIRCRAFT

National Stock Number:
5310-01-561-9872

Federal Supply Class:
5310

National Item Identification Number:
015619872

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:
500K1926-35RQL2DRS ENVIRONMENTAL SYSTEMS INC
500K1926-392878HDT EXPEDITIONARY SYSTEMS INC
500K1926-394833KECO INDUSTRIES INC.


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.219 INCHES NOMINAL
OVERALL DIAMETER0.500 INCHES NOMINAL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESSTEEL,ZINC PLATED
THICKNESS0.049 INCHES NOMINAL


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