Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number IB413 SIZE 1 2 IN found under Valve Globe by Hammond Valve Corp. The National Stock Number assigned to this part is 4820002747389, 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 IB413 SIZE 1 2 IN.