Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DBOU24E8D found under Nipple Tube by Metcalf Machine Inc. The National Stock Number assigned to this part is 4730010313277, 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 DBOU24E8D.