Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1000-516-019 found under Ring Support Transmission by Borgwarner Corp. The National Stock Number assigned to this part is 2520013892330, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1000-516-019.