5320-01-475-8946 PIN-RIVET Index 5305-01-475-8948 SCREW,EXTERNALLY RELIEVED BODY

National Stock Number:
5310-01-475-8947

Federal Supply Class:
5310

National Item Identification Number:
014758947

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:
564-7286740-853711NAVAL SEA SYSTEMS COMMAND
728674053711NAVAL SEA SYSTEMS COMMAND
H553-2003-896169ELECTRIC BOAT CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER1.160 INCHES NOMINAL
MATERIALPLASTIC ACETAL OVERALL
PERIPHERAL SHAPE STYLEROUND
PROPRIETARY CHARACTERISTICSPACS
OVERALL DIAMETER1.720 INCHES NOMINAL
SURFACE FINISH63.0 MICROINCHES ALL SURFACES
SURFACE FINISH125.0 MICROINCHES INNER
SURFACE FINISH125.0 MICROINCHES OUTER
THICKNESS0.095 INCHES NOMINAL


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