Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54R20K found under Resistor Variable N by Beckman Coulter Inc. The National Stock Number assigned to this part is 5905000510195, 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 54R20K.