1680-99-684-4207 FRAME SECTION,SEAT,AIRCRAFT Index 9905-99-684-4225 PLATE,INSTRUCTION

National Stock Number:
5310-99-684-4221

Federal Supply Class:
5310

National Item Identification Number:
996844221

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:
HLD148-487U5503HIAB LIMITED


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HOLE DIAMETER65.10 MILLIMETERS MINIMUM AND 65.25 MILLIMETERS MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONBS 970 070-20 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL OVERALL
III PART NAME ASSIGNED BY CONTROLLING AGENCYSHIM
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER99.75 MILLIMETERS MINIMUM AND 100.25 MILLIMETERS MAXIMUM
SURFACE FINISH3.2 MICROMETERS ALL SURFACES
SURFACE TREATMENTZINC AND PASSIVATE OVERALL
THICKNESS2.75 MILLIMETERS MINIMUM AND 3.00 MILLIMETERS MAXIMUM


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