ITP Star Styli are precision probing solutions designed for metrology work on large-diameter features, deep bores, and threaded surfaces. This silicon nitride ball version with an M3 XXT thread and 21 mm measuring length is ideal for long gauging runs and task-specific measurement programs.

• Ball material: Silicon nitride ball for high hardness, wear resistance, and smooth contact on challenging surfaces.
• Thread: M3 XXT threaded shank for secure, quick installation in compatible stylus holders.
• Measuring length: 21 mm measuring length supports long gauging paths without bending the stem.
• Star-styli versatility: Fixed probe arms and multiple configurations enable precise measurement of large diameters, undercuts, or threaded features; suitable for task-specific measuring programs.
• Application coverage: Ideal for deep holes, long bores, and features where conventional probes may deflect or collide.
• Part number: SCM3S3005030 for easy cataloging and replacement ordering.

By combining a robust silicon nitride contact with a long, rigid 21 mm stem, this star stylus minimizes deflection during deep-diameter measurements and improves repeatability across extended gauging lengths. The design accommodates undercuts and threads with reliable stability, reduces setup time through a flexible range of fixed-arm configurations, and enables precise bottom-hole measurements in W-type configurations when the stem-facing probe is absent. This makes it a dependable choice for production metrology, quality control, and precision inspection workflows.