Spi 21-246-4 Flat Contact Point Dial Indicator 4-48

Product Description

The SPI 21-246-4 is a flat contact point designed for use with dial indicators in precision measurement applications. Machined from black oxide steel, this contact point features a 4-48 thread for secure attachment to AGD Group 1 dial indicators. The contact point measures 1-1/4 inches in length and 3/16 inches in diameter, providing a stable flat contact surface for repeatable gauge readings. It is a direct-fit accessory for technicians and machinists who require accurate surface contact during inspection, setup, or in-process measurement tasks.

This contact point is suited for use on the shop floor, inspection bench, or in field measurement environments where dial indicators are part of standard metrology practice. The flat contact geometry makes it appropriate for checking flat surfaces, shoulders, and faces on machined components. It meets AGD Group 1 industry designation, which covers standard dial indicators commonly found in manufacturing, toolroom, and quality control settings.

Key Features

• Flat contact point geometry for consistent surface contact on flat and faced workpieces
• Black oxide steel construction for corrosion resistance and durability
• 4-48 thread matches AGD Group 1 dial indicator spindle standards
• 1-1/4 inch contact point length for reach in standard indicator setups
• 3/16 inch diameter provides a compact, defined contact area

Compatibility

Designed for use with dial indicators meeting AGD Group 1 standards and fitted with a 4-48 threaded spindle contact port. Verify thread size and contact port specification on the indicator before installation.

Installation Notes

Installation is performed by hand-threading the contact point onto the dial indicator spindle. Avoid over-tightening, as excessive torque can damage the fine 4-48 thread on the indicator spindle. Ensure the indicator is removed from active use and not under load before swapping contact points. A contact point wrench appropriate for the diameter is recommended to maintain proper seating without marring the contact surface.