Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7239-310-1080B found under Overspeed Switch As by Jones Instrument Corp. The National Stock Number assigned to this part is 2990011691699, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7239-310-1080B.