4540-01-213-0970 HEATING ELEMENT,ELECTRICAL,NONIMMERSION TYPE Index 5310-01-213-0972 WASHER,FLAT

National Stock Number:
5310-01-213-0971

Federal Supply Class:
5310

National Item Identification Number:
012130971

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:
5702-20-30S86928SEASTROM MANUFACTURING CO INC
910C331-5983843SUNDSTRAND CORP ELECTRIC POWER SYSTEMS DIV
910C331-5999167HAMILTON SUNDSTRAND CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.265 INCHES NOMINAL
MATERIALSTEEL OVERALL
III PRECIOUS MATERIAL AND LOCATIONALL SURFACES SILVER
III PRECIOUS MATERIALSILVER
PERIPHERAL SHAPE STYLEROUND
PROPRIETARY CHARACTERISTICSPACS
OVERALL DIAMETER0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-S-365,TY 1,GR B FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTSILVER OVERALL
THICKNESS0.022 INCHES MINIMUM AND 0.042 INCHES MAXIMUM


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