Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 98-60042 found under Gyroscope Rate by Atlantic Inertial Systems Inc. The National Stock Number assigned to this part is 6615008150606, and the Federal Supply Class is 6615 Automatic Pilot Mechanisms And Airborne Gyro Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 98-60042.