For number 10 screw size
A bent spring metal washer with a centrally located hole. It is designed to exert pressure axially when assembled in place.
Classification: Spring washers and other lock washers, iron or steel
NSN 4140-00-567-9291
NSN 6610-01-408-1134
NSN 6220-01-224-8746
NSN 5855-01-287-1515
NSN 5835-00-493-3667
NSN 5998-00-950-4126
NSN 5895-01-421-4160
NSN 5965-00-013-7990
NSN 6130-00-259-1697
NSN 5905-01-197-2517
NSN 5915-01-281-7382
NSN 6130-01-175-2092