Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GC300-6 found under Spring Gauge Cock by The Clark Eliance Corp. The National Stock Number assigned to this part is 5340009561678, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like GC300-6.