Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M5019NN found under Valve Stop Check by Henry Technologies Inc. The National Stock Number assigned to this part is 4820007361956, 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 M5019NN.