Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2 1 2EB SPR500 found under Spacer Sleeve by Regal Beloit Corp Durst Div. The National Stock Number assigned to this part is 5365015268323, 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 2 1 2EB SPR500.