Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H01-4-60-T-INT found under Internal S Calibration by Hoffer Flow Controls Inc. The National Stock Number assigned to this part is 6680014395353, 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 H01-4-60-T-INT.