Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AR4.11.8 IT20 found under Spring Helical Comp by Kone Industrial Oy. The National Stock Number assigned to this part is 5360014446342, 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 AR4.11.8 IT20.