Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12972 And 504833 found under Valve Electric Lock by Tymco International Inc. The National Stock Number assigned to this part is 4810012119472, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12972 And 504833.