Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XS-52C found under Switch Lever by Killark Electric Mfg Co. The National Stock Number assigned to this part is 5930013060828, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like XS-52C.