Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1C3903P8 found under Gage Pressure Dial Indicating by Noel Smyser Engineering Corp. The National Stock Number assigned to this part is 6620010374631, 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 1C3903P8.