5305-01-454-3898 SCREW,CLOSE TOLERANCE Index 5962-01-454-3900 MICROCIRCUIT,DIGITAL

National Stock Number:
5310-01-454-3899

Federal Supply Class:
5310

National Item Identification Number:
014543899

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:
B1822BH160R80204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER17.25 MILLIMETERS MINIMUM AND 17.52 MILLIMETERS MAXIMUM
OVERALL DIAMETER43.38 MILLIMETERS MINIMUM AND 44.00 MILLIMETERS MAXIMUM
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
THICKNESS3.00 MILLIMETERS MINIMUM AND 4.00 MILLIMETERS MAXIMUM


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