5310-00-471-6449 WASHER Index 5310-00-471-6451 WASHER,FLAT

National Stock Number:
5310-00-471-6450

Federal Supply Class:
5310

National Item Identification Number:
004716450

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:
99-912879699995NATO STOCK NUMBER ASSIGNED BY ANOTHER NATION
SP.126EK4975UFC AEROSPACE EUROPE LIMITED
SP126E2S109LENTERN INTL INC
SP126EK7766BRITISH STANDARDS INSTITUTION


Techincal Specification:
CENTER HOLE SHAPE STYLEROUND
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
HARDNESS RATING21.0 ROCKWELL C MINIMUM AND 22.0 ROCKWELL C MAXIMUM
HOLE DIAMETER0.267 INCHES MINIMUM AND 0.277 INCHES MAXIMUM
OVERALL DIAMETER0.502 INCHES MINIMUM AND 0.522 INCHES MAXIMUM
MATERIALSTEEL OVERALL
PERIPHERAL SHAPE STYLEROUND
SPECIAL FEATURESPER THE UK, THIS IS NOT A DUPLICATE OF NSN 5310-99-680-0061.
SURFACE TREATMENTCADMIUM OVERALL
THICKNESS0.017 INCHES MINIMUM AND 0.021 INCHES MAXIMUM


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