Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 212F found under Spring Helical Torsion by Friends Of The Potomac River. The National Stock Number assigned to this part is 5360004140141, 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 212F.