Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EVS-50MM FOR DIN PN10 FLANGE found under Valve Butterfly by Wouter Witzel Ltd. The National Stock Number assigned to this part is 4820171065057, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EVS-50MM FOR DIN PN10 FLANGE.