Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R6617243742 found under Valve Expansion by Unifab Industries Inc. The National Stock Number assigned to this part is 4820001061973, 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 R6617243742.