Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FSX5-1 found under Evaporator Coil Refrigeration by Standard Refrigeration Co. The National Stock Number assigned to this part is 4130012509854, and the Federal Supply Class is 4130 Refrigeration And Air Conditioning Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like FSX5-1.