Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 905-042 found under Parts Kit Valve by Cmb Industries. The National Stock Number assigned to this part is 4820012826977, 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 905-042.