Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 656-00001 found under Plug Machine Specia by Sheffer Corp. The National Stock Number assigned to this part is 5365004799194, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 656-00001.