Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WT215-16B found under Gear And Shaft by Perfection Clutch. The National Stock Number assigned to this part is 2520003896124, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WT215-16B.