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.
Dept. of the Air Force 
Greece Classification: Made-up articles of textile material, nesoi
NSN 6240-01-525-4275
NSN 2925-01-527-5335
NSN 5920-01-155-1128
NSN 5996-01-541-4974
NSN 5950-01-330-1667
NSN 6645-01-456-1182
NSN 7035-01-432-9034
NSN 5990-01-376-8930
NSN 6220-00-104-5365
NSN 6610-01-148-7637
NSN 5975-01-415-5650
NSN 5975-01-331-0953