Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BLD1782 found under Valve Assembly by Rollsroyce Airlines. The National Stock Number assigned to this part is 4820010175158, 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 BLD1782.