5310-01-220-6519 WASHER,FLAT Index 5310-01-220-6521 WASHER,CONCAVE

National Stock Number:
5310-01-220-6520

Federal Supply Class:
5310

National Item Identification Number:
012206520

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:
10110174A486GNIMIKKEISTOKESKUS NCB FINLAND
4M116-0400703033PLASTIFAB INCORPORATED
4M116-0400710630ANILLO INDUSTRIES INC
4M116-0400718986JETRON INC
4M116-0400721215AERO-PLASTICS, INC.
4M116-040073E613K & L PRECISION PLASTICS INC
4M116-0400758009MOELLER MANUFACTURING & SUPPLY, LLC
4M116-0400758870PLASTIFAB, INC.
4M116-040075N319INDIANA AIRCRAFT HARDWARE, INC.
4M116-0400776301THE BOEING COMPANY


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM
OVERALL DIAMETER0.615 INCHES MINIMUM AND 0.645 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-P-18177 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALPLASTIC EPOXY AND GLASS OVERALL
PERIPHERAL SHAPE STYLEROUND
THICKNESS0.019 INCHES MINIMUM AND 0.030 INCHES MAXIMUM


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