Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5A7042 found under Coupling Half Shaft by Napco International Llc. The National Stock Number assigned to this part is 3010003537283, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5A7042.