Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SW45B-2549 found under Resistor Variable Wire Wound Non by Industrial Control Co. The National Stock Number assigned to this part is 5905014528138, 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 SW45B-2549.