Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KC49678-5 found under Sensing Element Fire Detector Sy by Tolo Inc. The National Stock Number assigned to this part is 6340014651489, and the Federal Supply Class is 6340 Aircraft Alarm And Signal Systems. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KC49678-5.