Starrett 689-2Z Dial Indicator Countersink Gage 100° .160-.360" Range

The Starrett 689-2Z is a precision dial indicator countersink gage designed for accurate measurement of 100-degree countersinks. Unlike a chamfer gage, which contacts the top edge of the chamfer, this gage sets directly on the angular side of the countersink for a true diameter reading. With a measurement range of .160" to .360" and a graduation of .002", it delivers reliable, repeatable results in production and inspection environments.

Key Features:

• Directly reads the large diameter of the countersink in .002" increments
• Designed for 100-degree countersinks — gage sets on the angular side, not the top edge
• Push-button actuation firmly seats the gage head into the countersink; reading is held until reset
• Includes a set master ring for easy calibration and zero-setting
• All ground surfaces constructed of hardened tool steel for long-term durability
• AGD-design indicator for standardized, consistent dial readings
• Comes with a padded protective case for safe storage and transport
• Made in the USA

Specifications:

• Measurement Range: .160" – .360"
• Graduation: .002"
• Angle: 100 Degrees
• Dial Diameter: 1-43/64"
• Construction: Hardened Tool Steel
• EDP / Manufacturer No.: 63707

The Starrett 689-2Z countersink gage is ideal for machinists, quality control inspectors, and manufacturers who require fast, accurate measurement of countersunk holes. The hold-until-reset indicator makes it easy to record readings without losing position.