Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MB500863 found under Spacer Sleeve by 2Mb International. The National Stock Number assigned to this part is 5365013601686, 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 MB500863.