Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BS48 found under Round Metal by Bunting Bearings Corp. The National Stock Number assigned to this part is 9640009669008, and the Federal Supply Class is 9640 Iron And Steel Primary And Semifinished Products. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BS48.