Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15X20B found under Coupling Half Grooved Clamp Conn by P T Coupling Company. The National Stock Number assigned to this part is 4730016179579, 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 15X20B.