Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 159 000 187 found under Valveflow Control by Holmatro Inc. The National Stock Number assigned to this part is 4820016985315, 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 159 000 187.