Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R522728 found under Spring Helical Compression by Deere And Company. The National Stock Number assigned to this part is 5360015494016, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R522728.