5310-01-133-9477 WASHER,FLAT Index 5310-01-133-9479 WASHER,FLAT

National Stock Number:
5310-01-133-9478

Federal Supply Class:
5310

National Item Identification Number:
011339478

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:
4674802-001796169ELECTRIC BOAT CORPORATION
518-4674802 ITEM 1780064NAVAL SHIP SYSTEMS COMMAND


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER7.562 INCHES NOMINAL
INSIDE LEFT CORNER CHAMFER ANGLE450.0 DEGREES NOMINAL
INSIDE RIGHT CORNER CHAMFER ANGLE450.0 DEGREES NOMINAL
OVERALL DIAMETER12.000 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390,TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY 903 OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE FINISH63.0 MICROINCHES BOTTOM
THICKNESS0.620 INCHES NOMINAL


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