Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AV78-155PC20 found under Spring Helical Exte by Automatic Switch Company. The National Stock Number assigned to this part is 5360009728905, 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 AV78-155PC20.