Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 845 2007673 PC 5 found under Tailpiece Special by Electric Boat Corporation. The National Stock Number assigned to this part is 4820010667897, 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 845 2007673 PC 5.