Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4225B248E found under Shaft Roller Crawle by Koehring Co. The National Stock Number assigned to this part is 3040006204786, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4225B248E.