Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number OX111-01027 found under Insert Disk by Grove Valve Operations. The National Stock Number assigned to this part is 4820010343641, 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 OX111-01027.