Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X6519 found under Hose Assembly Nonmetallic by Indresco Inc. The National Stock Number assigned to this part is 4720004830733, 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 X6519.