Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Z-Z-1 4X1 4-5-60DEG found under Transducer Ultrasonic by Olympus Ndt Ne Inc. The National Stock Number assigned to this part is 6635010482839, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like Z-Z-1 4X1 4-5-60DEG.