Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20-4615-585604 found under Amplifier Universal by Gould Instrument Systems Inc. The National Stock Number assigned to this part is 6930012403390, 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 20-4615-585604.