Starrett 70800 Tapered Contact Point 4-48 Agd Dial Indicators

Product Description

The STARRETT 70800 is a tapered steel contact point designed for use with AGD dial indicators. It threads into the indicator spindle via a 4-48 thread and delivers consistent, repeatable surface contact in precision measurement applications. The tapered profile concentrates contact at a defined point, reducing measurement error caused by surface variation. At 1 inch in contact point length and 1/16 inch in tip diameter, this point suits close-tolerance inspection work where a standard ball-end point would introduce too much contact area. It is a direct replacement or spare for technicians who regularly service or recalibrate AGD dial indicator setups.

This contact point is suited for dimensional inspection, surface gauging, and runout measurement in machine shop, metrology lab, and manufacturing quality-control environments. Technicians performing in-process inspection on machined parts, mold surfaces, or precision assemblies will find the tapered geometry useful when accessing recessed features or angled surfaces. It fits AGD-standard dial indicators across a range of brands that use the 4-48 spindle thread specification.

Key Features

• Tapered contact point style concentrates measurement contact for improved accuracy on uneven or angled surfaces
• 4-48 thread size for direct fitment to AGD dial indicator spindles
• 1/16 inch tip diameter for use in confined or detail inspection areas
• 1 inch contact point length provides reach for recessed measurement targets
• Steel construction for wear resistance in repeated-use inspection routines
• Overall length of 1/4 inch keeps indicator stack-up compact

Compatibility

Designed for use with AGD dial indicators that accept a 4-48 threaded contact point. Verify your indicator spindle thread specification before installation.

Installation Notes

Contact point replacement is performed by metrology technicians or machinists using the appropriate spanner or contact point wrench. Ensure the dial indicator is removed from active measurement fixtures before swapping contact points. Avoid overtightening the threaded contact point into the spindle, as this can damage the 4-48 thread on the indicator stem. Confirm zero calibration after any contact point change before returning the indicator to service.