1680-01-501-3426 FLAP,PROTECTIVE Index 5330-01-501-3428 GASKET

National Stock Number:
5310-01-501-3427

Federal Supply Class:
5310

National Item Identification Number:
015013427

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:
21109721653711NAVAL SEA SYSTEMS COMMAND
751-6402510-4453711NAVAL SEA SYSTEMS COMMAND
751-6402558-153711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.383 INCHES MINIMUM AND 0.390 INCHES MAXIMUM
MATERIALPLASTIC ACETAL OVERALL
PERIPHERAL SHAPE STYLEROUND
PROPRIETARY CHARACTERISTICSPACS
OVERALL DIAMETER0.617 INCHES MINIMUM AND 0.621 INCHES MAXIMUM
SURFACE FINISH125.0 MICROINCHES ALL SURFACES
THICKNESS0.053 INCHES NOMINAL


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