Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1200S25E found under Pressure Relief Device Assembly by Superior Valve Co. The National Stock Number assigned to this part is 8120000790544, and the Federal Supply Class is 8120 Commercial And Industrial Gas Cylinders. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1200S25E.