Starrett 684-1Z Dial Internal Chamfer Gage Range Angle - 0-3/8 90-127

The Starrett 684-1Z is a precision dial internal chamfer gage designed to directly measure the largest diameter of chamfered holes without the need for a setting master. Featuring a 0–3/8" (0–0.375") measurement range and a 90–127° included angle range, this instrument is ideal for quality control and inspection applications requiring accurate chamfer diameter readings.

Key Features:

• Direct measurement of chamfered hole diameters — no setting master required
• Measurement range: 0 to 3/8" (0.375")
• Angle range: 90° to 127° included angle
• Graduation: 0.001"
• Three-blade plunger design for consistent, repeatable contact with chamfered surfaces
• AGD (American Gage Design) dial indicator for standardized readability
• Self-checking calibration — when the plunger is pressed against a flat surface, the gage reads the set number stamped on the back of the indicator
• Adjustable for wear — can be recalibrated to maintain accuracy over time
• Includes a deluxe padded carrying case for protection and storage
• Electronic indicator versions available upon request

Built by Starrett — a precision tool manufacturer since 1880 — the 684-1Z delivers the accuracy and durability that machinists, toolmakers, and quality inspectors demand. The Starrett EDP number for this gage is 63688.