Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1-2IN2-81-301 found under Gage Pressure Dial Indicating by Idd Aerospace Corp. The National Stock Number assigned to this part is 6620013913497, 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 1-2IN2-81-301.