Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 70A000-4 found under Refrigeration Unit by Enviro Systems Inc. The National Stock Number assigned to this part is 1660016430847, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 70A000-4.