Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 520822 found under Hose Nonmetallic by Empire Abrasive Equipment Company. The National Stock Number assigned to this part is 4720014599804, 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 520822.