No. 10 screw size
A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Classification: Washers other than lock washers, iron or steel
NSN 6685-01-392-6138
NSN 6620-00-890-3931
NSN 5930-01-374-6396
NSN 6130-00-243-2208
NSN 6685-01-506-5546
NSN 7035-00-549-2722
NSN 5998-01-483-1426
NSN 6240-01-556-0650
NSN 6130-00-205-1714
NSN 6650-00-525-3446
NSN 5965-01-477-6665
NSN 6240-01-014-5598