Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E1-012B-3MW found under Spring Helical Exte by Lee Spring Co Inc. The National Stock Number assigned to this part is 5360011800314, 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 E1-012B-3MW.