Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12K10 found under Elbow Tube by Clark Equipment Co. The National Stock Number assigned to this part is 4730009201835, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12K10.