Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T4983 found under Link Drive Chain Cr by Koehring Co. The National Stock Number assigned to this part is 2520005931292, 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 T4983.