Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CA9019B found under Spring Helical Extension by Acme Steel Co. The National Stock Number assigned to this part is 5360013328185, 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 CA9019B.