Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GC1-1 2IN found under Valve Safety Relief by Tyco Valves And Controls Lp. The National Stock Number assigned to this part is 4820001422807, 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 GC1-1 2IN.