Starrett 63707 Countersink Gage 100 Degree 0.16 to 0.36 in

Product Description

The STARRETT 63707 is a countersink gage designed to measure the included angle and diameter of countersunk holes in machined, fabricated, or assembled workpieces. It covers a range of 0.16 to 0.36 inches and is built for a 100-degree countersink angle. The body is constructed from hardened tool steel for dimensional stability under shop conditions. A white dial face provides clear, high-contrast readings. The unit ships with a set master ring for calibration and zero-setting. It is used by machinists, tool-and-die makers, and quality control technicians in production and inspection environments.

The 63707 is suited for inspecting countersunk fastener holes in metal and composite assemblies where a 100-degree angle specification must be verified. It fits into quality assurance workflows on the shop floor or at an inspection bench. The 0.16 to 0.36 inch diameter range accommodates small to mid-size countersinks commonly found in sheet metal, aerospace, and general machining applications. The included set master ring allows technicians to establish a reliable reference point before measurement.

Key Features

• 100-degree countersink angle measurement for standard 100-degree fastener hole verification
• Measurement range of 0.16 to 0.36 inches covers common small countersink diameters
• Hardened tool steel construction resists wear and maintains accuracy over repeated use
• White dial face delivers high-contrast readability in typical shop lighting
• Includes a set master ring for quick and repeatable calibration setup

Compatibility

Designed as an OEM-style inspection tool for verifying 100-degree countersunk holes in machined and fabricated components across general manufacturing and quality control applications.

Installation Notes

The 63707 is a hand-held inspection gage and does not require permanent installation. Use the included set master ring to zero the gage before taking measurements. Keep the contact surfaces clean and free of chips or debris to ensure accurate readings. Store the gage in its case when not in use to protect the dial mechanism and hardened contact points.