Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90073 ITEM 18 found under Resistor Thermal by Espey Mfg And Electronics Corp. The National Stock Number assigned to this part is 5905015415366, 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 90073 ITEM 18.