Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RH0052-2120-JCU found under Resistor Variable W by E Systems Inc. The National Stock Number assigned to this part is 5905010619510, 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 RH0052-2120-JCU.