Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 500-0-300-2-1-2 found under Gage Pressure Dial Indicating by Ametek Inc. The National Stock Number assigned to this part is 6685000664101, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 500-0-300-2-1-2.