Spi 21-278-7 Flat Contact Point Dial Indicator 4-48

Product Description

The SPI 21-278-7 is a flat contact point designed for use with dial indicators in precision measurement applications. Machined from steel, this contact point features a 4-48 threaded shank that threads directly into compatible dial indicator stems. The flat contact face provides consistent surface contact for accurate linear displacement readings on flat or near-flat workpieces. With an overall length of 0.375 inches and a diameter of 0.375 inches, it is a compact, drop-in replacement suited for AGD Group 1 dial indicator configurations. Machinists, quality control technicians, and toolroom professionals install this type of accessory as part of standard gauge setup.

This contact point is intended for use with dial indicators in manufacturing, toolroom, and inspection environments. It is well suited for setups where a flat contact face is needed to measure surface runout, part height, or feature location. The AGD Group 1 industry designation means it fits a standardized class of dial indicators commonly found in production and quality assurance settings. It is appropriate for both bench-mounted indicator setups and transfer-gauge applications.

Key Features

• Flat contact face for consistent contact on flat workpiece surfaces
• Steel construction for durability and wear resistance
• 4-48 threaded shank for secure, repeatable attachment to dial indicator stems
• 0.375 inch overall length provides a compact, low-profile installation
• Meets AGD Group 1 industry designation standards
• Sold individually, no additional hardware required

Compatibility

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

Installation Notes

This contact point is installed by toolroom technicians, machinists, or quality control personnel. Before swapping contact points, remove the dial indicator from any active fixture and handle the gauge stem carefully to avoid damage to the rack and pinion mechanism. Thread the contact point in by hand first, then snug with an appropriate wrench without overtightening, as the 4-48 thread is fine and can strip if excessive force is applied. Verify indicator zeroing and plunger travel after installing a new contact point.