Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D 10027 A DN125 MAN SQ found under Valve Butterfly by Wouter Witzel Ltd. The National Stock Number assigned to this part is 4820171101509, 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 D 10027 A DN125 MAN SQ.