Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 29712B found under Tube Assembly Metal by Air Products And Chemicals Inc. The National Stock Number assigned to this part is 4710000926877, 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 29712B.