Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X9816F found under Plate Retaining Sha by Twin Disc Incorporated. The National Stock Number assigned to this part is 3040013197491, 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 X9816F.