Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 311139F91 found under Tube Bent Metallic by Isotta Fraschini Motori Spa. The National Stock Number assigned to this part is 4710013743791, and the Federal Supply Class is 4710 Pipe Tube And Rigid Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 311139F91.