Spi 21-264-7 Flat Needle Contact Point Dial Indicator

Product Description

The SPI 21-264-7 is a flat needle 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 a slender 0.025-inch measurement tip diameter that allows accurate readings in tight or recessed measurement locations. With a contact point length of 1 inch, it provides the reach needed for standard dial indicator setups. Installation requires no special tooling beyond a wrench or pin spanner compatible with the indicator body. Technicians in metrology, machining, quality control, and tool-and-die work rely on contact points like this to maintain measurement accuracy at the indicator tip.

This contact point is suited for bench-top and in-process inspection tasks where a flat needle profile is required. The AGD Group 1 industry designation ensures dimensional compatibility with a wide range of standard dial indicators that accept 4-48 threaded contact points. It is a direct-fit replacement or spare for shops maintaining multiple indicators across production, inspection, or calibration workflows.

Key Features

• Flat needle contact style for precise point-contact measurement
• Black oxide steel construction for durability and corrosion resistance
• 4-48 thread size for compatibility with AGD Group 1 dial indicators
• 0.025-inch tip diameter allows access to narrow or recessed surfaces
• 1-inch contact point length provides standard reach for typical indicator setups
• AGD Group 1 industry designation for broad interchangeability

Compatibility

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

Installation Notes

A licensed or trained metrology technician or machinist should install contact points following the indicator manufacturer guidelines. Remove the existing contact point by unscrewing it from the indicator spindle before threading on the replacement. Do not overtighten, as this can damage the spindle threads or affect indicator calibration. After installation, verify zero and repeatability against a known reference surface before returning the indicator to service.