Starrett 63703 Countersink Gage 90 Degree 0.16-0.36 in

Product Description

The STARRETT 63703 is a countersink gage designed to measure the diameter of 90-degree countersunk holes with precision. Built from hardened tool steel, this gage features a white dial face for clear, direct readings in the field or at the bench. It covers a measurement range of 0.16 to 0.36 inches, making it well-suited for inspecting fastener seating in metal fabrication, machining, and sheet metal work. Machinists, tool and die makers, and quality control technicians rely on countersink gages to verify that countersinks meet specification before final assembly.

This gage is used wherever 90-degree countersinks must be checked for correct diameter and depth consistency. Typical applications include production inspection of drilled and countersunk holes in structural components, aerospace sheet metal, and general machined parts. The compact size and direct-reading dial make it practical for both shop floor use and inspection bench setups. It is appropriate for any trade or manufacturing environment where fastener flush-mount accuracy is critical.

Key Features

• Measurement range of 0.16 to 0.36 inches covers common small-fastener countersink sizes
• Designed specifically for 90-degree countersink angle verification
• Hardened tool steel construction for durability in production environments
• White dial face provides high-contrast, easy-to-read measurements
• Compact design suited for bench inspection and in-process shop floor checks

Compatibility

Designed for use on 90-degree countersunk holes within the 0.16 to 0.36 inch diameter range, as found in standard countersunk fastener applications across metal fabrication and machining.

Installation Notes

This is a precision measuring instrument, not an installed component. Handle with care to avoid dropping or contacting abrasive surfaces that could affect calibration. Store in a protective case when not in use. Periodically verify zero and calibration against a known reference standard per your shop quality procedures.