Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 247B253A found under Shaft Straight by Koehring Cranes And Excavators Inc. The National Stock Number assigned to this part is 3040006021089, 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 247B253A.