Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0550F5 169 found under Resistor Thermal by Cesiwid Inc. The National Stock Number assigned to this part is 5905010554042, 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 0550F5 169.