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 5905-01-342-9427
NSN 5930-01-572-9664
NSN 6240-00-113-1912
NSN 5835-01-384-3206
NSN 5930-01-488-1254
NSN 6220-01-272-3177
NSN 5998-01-256-8765
NSN 5990-01-649-4647
NSN 6320-00-809-5744
NSN 5960-01-154-3719
NSN 5950-01-024-9461
NSN 6105-01-105-0042