Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GLD A3 STYLE B 1IN found under Valve Diaphragm Con by Aerco International Inc. The National Stock Number assigned to this part is 4820012244972, 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 GLD A3 STYLE B 1IN.