Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B19-1309W found under Clutch Assembly Jaw by Barber Greene Co. The National Stock Number assigned to this part is 3010007636891, 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 B19-1309W.