4920-00-442-0299 FIXTURE,AIRCRAFT MAINTENANCE Index 4940-00-442-0305 ADAPTER,MECHANICAL TEST

National Stock Number:
5310-00-442-0304

Federal Supply Class:
5310

National Item Identification Number:
004420304

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:
4474224617GENERAL MOTORS CORP
4474273342ALLISON TRANSMISSION INC
4474277592GENERAL MOTORS CORP ROCHESTER PRODUCTS DIV
447427X677GENERAL MOTORS LLC


Techincal Specification:
MATERIALSTEEL COMP 1010 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5042 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.190 INCHES MINIMUM AND
0.194 INCHES MAXIMUM
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.359 INCHES NOMINAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
THICKNESS0.032 INCHES NOMINAL
HARDNESS RATING52.0 ROCKWELL B MINIMUM AND
4.0 ROCKWELL C MAXIMUM


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