Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 250052401 found under Valve Relief Pressu by Barnstead Thermolyne Corporation. The National Stock Number assigned to this part is 4820014073411, 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 250052401.