5310-00-720-8420 WASHER,LOCK Index 5305-00-720-8428 SCREW,MACHINE

National Stock Number:
5310-00-720-8424

Federal Supply Class:
5310

National Item Identification Number:
007208424

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:
912915518876U S ARMY AVIATION AND MISSILE COMMAND
AN960C10LM0D06401L3 TECHNOLOGIES, INC.
PWA52916-277445RTX CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.193 INCHES MINIMUM AND 0.213 INCHES MAXIMUM
OVERALL DIAMETER0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM
MATERIALSTEEL CORROSION RESISTING OVERALL
PERIPHERAL SHAPE STYLEDEE
WIDTH0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM
SURFACE TREATMENTPASSIVATE OVERALL
THICKNESS0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM


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