Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2-03-1-6004 found under Gage Compound Pressure Vacuum Di by Uni Systems Inc. The National Stock Number assigned to this part is 6685006780567, 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 2-03-1-6004.