Mitutoyo 101204 Spherical Contact Point 4-48 3/8 in

Product Description

The MITUTOYO 101204 is a spherical contact point designed for use with drop indicators and dial gages. It threads directly into the indicator spindle using a 4-48 thread, providing a secure, repeatable contact surface for precision measurement. The contact point is manufactured from solid carbide, delivering the hardness and wear resistance required for high-cycle measurement applications. With a spherical tip geometry, the 101204 establishes consistent point contact against workpiece surfaces, reducing measurement error caused by surface irregularities. This contact point is installed by metrology technicians and machine shop personnel performing dimensional inspection and part verification work.

The 101204 is suited for use with AGD Group 1, 2, 3, and 4 dial gages, covering the most common indicator sizes found in production and inspection environments. It is appropriate for bench setups, surface plate work, fixture-mounted inspection, and machine tool applications where a drop indicator is used to verify part geometry, runout, or surface deviation. The spherical contact geometry makes it a practical choice when measuring curved or irregular surfaces where a flat or pointed tip would introduce cosine error or inconsistent seating.

Key Features

• Spherical contact point style for consistent point contact on flat and curved surfaces
• Solid carbide construction for high wear resistance in repetitive measurement cycles
• 4-48 threaded shank for direct installation into standard AGD indicator spindles
• 0.0938 inch contact point length for compact clearance in tight measurement setups
• 3/8 inch (0.3750 inch) tip diameter provides a well-defined spherical contact zone
• Compatible with AGD Group 1, 2, 3, and 4 indicators

Compatibility

Designed for use with AGD 1, 2, 3, and 4 drop indicators and dial gages equipped with a 4-48 threaded spindle.

Installation Notes

Installation is performed by hand-threading the contact point into the indicator spindle; avoid over-tightening, which can damage the fine 4-48 thread. Before replacing a contact point, remove the indicator from any active fixture or gage stand to prevent accidental spindle damage. Use only contact points with the correct thread specification for the indicator model to maintain calibration integrity. If the indicator is used in a certified measurement process, re-verify the instrument calibration after any contact point change.