Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GCP 318 PIECE 2 found under Cock Drain by M T Davidson Company. The National Stock Number assigned to this part is 4820002723332, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like GCP 318 PIECE 2.