Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 521-2020916PC314 found under Spring Helical Compression by Supervisor Of Shipbuilding. The National Stock Number assigned to this part is 5360009169455, 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 521-2020916PC314.