5360-00-781-1896 SPRING,HELICAL,COMPRESSION Index 3655-00-781-1899 RETAINER,SPINDLE

National Stock Number:
5310-00-781-1897

Federal Supply Class:
5310

National Item Identification Number:
007811897

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:
B81-8-1039-281361EDGEWOOD CHEMICAL BIOLOGICAL CENTER ECBC


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HARDNESS RATING68.0 ROCKWELL B MAXIMUM
HOLE DIAMETER0.891 INCHES MINIMUM AND 0.901 INCHES MAXIMUM
OVERALL DIAMETER1.210 INCHES MINIMUM AND 1.290 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENTCADMIUM AND CHROMATE OR PHOSPHATE OVERALL
THICKNESS0.030 INCHES NOMINAL


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