Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number J6523-2 found under Probe Refueling Air by Tektronix Inc. The National Stock Number assigned to this part is 1560013927179, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like J6523-2.