Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 012890200 found under Restrictor Air by Therma Tech Engineering Inc. The National Stock Number assigned to this part is 4130015142340, 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 012890200.