Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2.72-37336 4459 found under Valve Check by Goldsworthy E C And Co. The National Stock Number assigned to this part is 4820121948571, 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 2.72-37336 4459.