Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 442-1770-019 found under Resistor Fixed Film by Boeing Company The. The National Stock Number assigned to this part is 5905004445479, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 442-1770-019.