Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number N4972 found under Tubing Nonmetallic by Bauer Kompressoren Gmbh Systemwerk. The National Stock Number assigned to this part is 4720121859648, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like N4972.