Spi 21-269-6 Tapered Contact Point Dial Indicator

Product Description

The SPI 21-269-6 is a tapered contact point designed for use with dial indicators in precision measurement applications. Manufactured from black oxide steel, this contact point features a 4-48 thread size and measures 1.5 inches in length with a 1/64 inch tip diameter. The tapered geometry allows the tip to reach into tight bores, grooves, and recessed features where a standard ball-end point cannot seat accurately. It meets AGD Group 1 industry designation standards, making it a compatible replacement across a wide range of dial indicator bodies used in machining, metrology, and quality control environments. Installation requires no tools beyond hand-tightening into the indicator spindle.

This contact point is intended for professional use in machine shops, manufacturing facilities, and inspection departments. It is suited for applications requiring precise surface or bore measurement where the probe tip must access narrow or angled features. The 4-48 thread is a standard AGD thread pattern widely found on dial indicators used in layout, fixturing, and in-process gauging work. Machinists, tool-and-die makers, and quality control technicians are the primary users of this accessory.

Key Features

• Tapered contact point style for access to tight or recessed measurement surfaces
• Black oxide steel construction for durability and corrosion resistance
• 4-48 thread size conforming to AGD Group 1 industry standard
• 1.5 inch contact point length for extended reach applications
• 1/64 inch tip diameter for precision contact on small features

Compatibility

Designed for use with dial indicators accepting a 4-48 thread contact point, conforming to AGD Group 1 industry designation standards.

Installation Notes

Installation is performed by a machinist or metrology technician. Before replacing the contact point, remove the dial indicator from any active fixture and ensure it is not under spring load against a workpiece. Thread the contact point into the indicator spindle by hand until snug, taking care not to overtighten, which can damage the fine 4-48 threads. Verify tip runout and indicator zeroing after installation before returning the instrument to service.