Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55LR20K found under Resistor Variable N by Newington Electric Co Inc. The National Stock Number assigned to this part is 5905009423510, 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 55LR20K.