Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DM20-50UC found under Hosenonmetallic by Dixon Valve And Coupling Co. The National Stock Number assigned to this part is 4720016797790, 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 DM20-50UC.