Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K2 133.233 found under Elbow Flange To Pip by Scandinavian Boiler Serviceinc. The National Stock Number assigned to this part is 4730222691784, 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 K2 133.233.