Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D8497-185-105 found under Nut Assembly Tube Coupling by Drs Environmental Systems Inc. The National Stock Number assigned to this part is 4730003111162, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D8497-185-105.