Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KS12J30B found under Air Conditioner by U S Natural Resources Inc. The National Stock Number assigned to this part is 4120014195729, and the Federal Supply Class is 4120 Air Conditioning Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KS12J30B.