5310-01-499-6576 WASHER,FLAT Index 4820-01-499-6578 VALVE,CHECK

National Stock Number:
5310-01-499-6577

Federal Supply Class:
5310

National Item Identification Number:
014996577

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:
70304-02114-17478286SIKORSKY AIRCRAFT CORPORATION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.578 INCHES NOMINAL
OVERALL DIAMETER1.062 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059, AMS 5510, AMS 5512 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESWASHER, FIREWALL ASSEMBLY, LONGITUDINAL R.H.
THICKNESS0.032 INCHES NOMINAL


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