Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E-6 PD4 found under Grinding And Buffing Machine Uti by Wissota Mfg Co Inc. The National Stock Number assigned to this part is 3415013820922, and the Federal Supply Class is 3415 Grinding Machines. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E-6 PD4.