Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-4227 found under Gage Pressure Dial Indicating by Altec Industries Inc. The National Stock Number assigned to this part is 6620011492841, and the Federal Supply Class is 6620 Engine Instruments. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A-4227.