Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T-A1-801-POSITI found under by Offshore A S. The National Stock Number assigned to this part is 4820251502399, 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 T-A1-801-POSITI.