4920-00-450-8020 ADAPTER ASSEMBLY,INTERFACE DEVIC Index 5305-00-450-8023 SCREW,CLOSE TOLERANCE

National Stock Number:
5310-00-450-8021

Federal Supply Class:
5310

National Item Identification Number:
004508021

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:
934D9182ZF INDUSTRIEANTRIEBE WITTEN GMBH
LS5984D5M98897LOCKHEED MARTIN CORP


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER0.319 INCHES MINIMUM AND 0.329 INCHES MAXIMUM
OVERALL DIAMETER0.515 INCHES MINIMUM AND 0.525 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/5 T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5 T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALALUMINUM ALLOY 2024 OVERALL
PERIPHERAL SHAPE STYLEROUND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCHROMATE OR ANODIZE OVERALL
THICKNESS0.035 INCHES MINIMUM AND 0.045 INCHES MAXIMUM


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