Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2051981-0509 found under Cap Electrical by Raytheon Company. The National Stock Number assigned to this part is 5999006218652, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2051981-0509.