Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MSS21704-1408W found under Hose Assembly Metallic by Mid State Sales Inc. The National Stock Number assigned to this part is 4720008398962, 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 MSS21704-1408W.