3120-01-184-1929 BUSHING,SLEEVE Index 3020-01-184-1932 PULLEY,GROOVE

National Stock Number:
5310-01-184-1930

Federal Supply Class:
5310

National Item Identification Number:
011841930

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:
21522151-187AC90NBAE SYSTEMS HAGGLUNDS AKTIEBOLAG
21522151-187S3465BAE SYSTEMS HAGGLUNDS AB
90791-991076M6AMZ ALABAMA INC.
90791-9910BAT5U.S. DEFENSE SERVICES, INC.


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