Starrett 683-1Z Internal Chamfer Gage Range - 0-3/8

The Starrett 683-1Z Internal Chamfer Gage is a precision hand tool designed to quickly and accurately measure the size of internal chamfers on machined bores, holes, and counterbores. Engineered by L.S. Starrett — a trusted name in precision metrology — this gage allows machinists, inspectors, and toolmakers to verify chamfer dimensions without the guesswork of visual estimation.

The 683-1Z features a 0 to 3/8" (0–9.5 mm) measurement range, making it ideal for checking small internal chamfers commonly found in precision machined components, hydraulic fittings, and aerospace or automotive parts.

Key Features:

• Measurement range: 0 to 3/8" for small internal chamfers
• Designed to measure internal 90° chamfers on bored holes and counterbores
• Spring-loaded cone contact for consistent, repeatable readings
• Compact, ergonomic body for easy one-hand operation
• Hardened and ground contact surfaces for long-term durability and accuracy
• Manufactured by L.S. Starrett to exacting quality standards

The Starrett 683-1Z is an essential tool for quality control and shop floor inspection wherever precise chamfer measurement is required. It delivers reliable results in a simple, easy-to-use design trusted by machinists worldwide.