Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28D1 C found under Resistor Thermal by Meas Us Llc. The National Stock Number assigned to this part is 5905007552979, 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 28D1 C.