Spi 21-247-2 Flat Contact Point Dial Indicator 4-48

Product Description

The SPI 21-247-2 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 size and meets AGD Group 1 industry standards. At 7/8 inches in contact point length and 3/16 inches in diameter, it provides a stable, flat bearing surface for accurate gauge readings. Installation is straightforward and requires no special tools beyond those used for standard dial indicator setup. This part is suited for metrology technicians, machinists, and calibration professionals working with dial-type measuring instruments.

This contact point is appropriate for use in precision inspection and measurement environments, including machine shops, quality control stations, and calibration labs. It replaces worn or damaged flat contact points on dial indicators conforming to AGD Group 1 specifications. The black oxide finish helps resist corrosion in typical shop environments. Sold individually, this part is a direct-fit replacement in applications where a flat contact surface is required for measuring flat or broad workpiece faces.

Key Features

• Flat contact point style provides consistent surface contact for accurate dial indicator readings
• Black oxide steel construction resists corrosion in shop environments
• 4-48 thread size for secure attachment to compatible dial indicator stems
• Meets AGD Group 1 industry designation for standardized fitment
• 7/8 inch contact point length suits typical reach requirements in bench and surface measurement setups

Compatibility

Designed for use with dial indicators conforming to AGD Group 1 standards that accept a 4-48 threaded contact point.

Installation Notes

Contact point replacement on dial indicators should be performed by a qualified metrology technician or machinist familiar with precision measuring instruments. Before swapping contact points, ensure the dial indicator is removed from its holder and is stable on a clean work surface. Use the appropriate wrench size for the 4-48 thread to avoid cross-threading or over-tightening, which can affect gauge accuracy. Handle the contact point and indicator spindle carefully to prevent damage to calibration.