Starrett 53121 Dial Thickness Gage 0-1 in 0.001 Grad

Product Description

The STARRETT 53121 is a dial thickness gage designed for precise measurement of material thickness in trade and industrial applications. It reads from 0 to 1 inch with a graduation of 0.001 inches, providing the resolution needed for sheet metal, gaskets, shims, and similar flat stock. The 2.5-inch throat depth allows clearance to reach interior measurement points that a standard gage cannot access. The 2.25-inch dial diameter makes the reading easy to view in the field. A jewel bearing movement supports repeatable, low-friction readings over extended service life. Licensed machinists, HVAC technicians, and sheet-metal workers are the primary users of this instrument.

The 53121 suits residential and light commercial trade work wherever flat material thickness must be verified quickly and accurately. Typical applications include checking sheet metal stock, gasket material, insulation board, and rubber seals before installation. The flat contact surfaces and continuous dial make it straightforward to use on any flat or near-flat workpiece. Its portable form factor means it travels easily in a tool bag without requiring a bench setup.

Key Features

• 0 to 1 inch measurement range with 0.001 inch graduation for precise readings
• 2.5 inch throat depth for reaching interior measurement locations
• 2.25 inch dial diameter for clear, easy-to-read display
• Jewel bearing movement for smooth, repeatable operation
• Continuous dial with balanced 0-100 dial reading scale
• Flat contact tips with 0.25 inch contact diameter for consistent surface engagement
• Portable design suited for field use without additional fixtures

Compatibility

Designed as an OEM-style dial thickness gage suitable for measuring flat stock, sheet material, gaskets, and shims in trade and light industrial environments.

Installation Notes

No installation is required for this handheld measuring instrument. Before use, zero the dial against a known flat reference surface to confirm calibration. Keep contact faces clean and free of debris to maintain measurement accuracy. Store the gage in a protective case when not in use to prevent damage to the dial mechanism and contact tips.