Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2283 found under Retainer Spring by Allied Healthcare Products Inc. The National Stock Number assigned to this part is 4220000222981, and the Federal Supply Class is 4220 Marine Lifesaving And Diving Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2283.