Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B 2P4T4 found under Valve Plug by Swagelok Ltd. The National Stock Number assigned to this part is 4820012547042, 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 B 2P4T4.