Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 371.59B found under Wrench Valve Seat by Magnatrol Valve Corporation. The National Stock Number assigned to this part is 4810012328190, 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 371.59B.