Part Number: 810-2178000-1 ITEM 91

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CONDITION:
NS
NAVAL SHIP SYSTEMS COMMAND80064
NAVAL SHIP SYSTEMS COMMAND80064
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER1.760 INCHES NOMINAL
PERIPHERAL SHAPE STYLEROUND
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.055 INCHES MINIMUM AND 0.059 INCHES MAXIMUM
OVERALL DIAMETER2.750 INCHES NOMINAL
SURFACE FINISH63.0 MICROINCHES ALL SURFACES
MATERIALCOPPER ALLOY 606 OVERALL OR COPPER ALLOY 614 OVERALL OR COPPER ALLOY 630 OVERALL OR COPPER ALLOY 642 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-465 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
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 ( .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 . 6 inches ( .15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be . 16 inches ( .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.