4730-00-947-6897 TAILPIECE,UNION Index 3110-00-947-6904 CUP,TAPERED ROLLER BEARING

National Stock Number:
5310-00-947-6903

Federal Supply Class:
5310

National Item Identification Number:
009476903

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:
531001028887178286SIKORSKY AIRCRAFT CORPORATION
6435-20179-10078286SIKORSKY AIRCRAFT CORPORATION
6435-20179-100D1081AIRBUS DEUTSCHLAND GMBH -WERK BREMEN-


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.505 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
OVERALL DIAMETER1.250 INCHES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 COND C MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 4340 OVERALL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURES0.500RADIUS LEFT AND RIGHT SIDE
SURFACE FINISH100.0 MICROINCHES BOTTOM
SURFACE FINISH100.0 MICROINCHES TOP
SURFACE TREATMENTCADMIUM OVERALL
THICKNESS0.177 INCHES MINIMUM AND 0.180 INCHES MAXIMUM


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