Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M666301-3-0031 found under Hose Assembly Nonmetallic by Eaton Corporation. The National Stock Number assigned to this part is 4720004972902, 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 M666301-3-0031.