Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CR 1 06 Z found under Valve Check by Senior Aerospace Jet Products Corp. The National Stock Number assigned to this part is 4820143442778, 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 CR 1 06 Z.