Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CYL 2400 4500 found under Washer Spring Tension by H K Metalcraft Manufacturing. The National Stock Number assigned to this part is 5310016656246, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CYL 2400 4500.