Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 310R3993OHMS found under Resistor Fixed Wire Wound Nonind by Ultronix Inc. The National Stock Number assigned to this part is 5905001037318, 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 310R3993OHMS.