Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5MF20-1052 found under by General Marine Refrigeration Corp. The National Stock Number assigned to this part is 4820016073148, 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 5MF20-1052.