Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F4855 found under Spring Helical Torsion by Raytheon Company. The National Stock Number assigned to this part is 5360006649187, 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 F4855.