Spi 13-195-3 Double Square Rule 6 Inch 16R

Product Description

The SPI 13-195-3 is a 6-inch double square rule machined from hardened steel and designed for precision layout and measurement work. The blade carries a 16R graduation pattern, providing four graduation increments: 1/100 inch, 1/64 inch, 1/50 inch, and 1/32 inch on a single blade. This range of graduations allows machinists, toolmakers, and skilled tradespeople to switch between measurement conventions without changing tools. The hardened steel construction resists wear under regular shop use and maintains calibration over time. The compact 6-inch blade length suits bench work, fixture layout, and close-tolerance scribe operations where a full-size rule would be unwieldy.

The 13-195-3 is suited for machine shop, fabrication, and toolroom environments where multiple graduation increments are required on a single measuring tool. It is a practical bench rule for checking part dimensions, scribing layout lines, and setting other measuring instruments. The 16R double square configuration is a standard format recognized across metalworking and precision trades, making this rule a conventional choice for shops that work in both fractional and decimal inch systems.

Key Features

• 6-inch blade length for compact, close-tolerance layout work
• 16R graduation style with four increments: 1/100 in, 1/64 in, 1/50 in, and 1/32 in
• Hardened steel construction for wear resistance and long-term calibration retention
• Double square format provides graduations on both edges of the blade
• Single-piece package suitable for individual bench or kit use

Compatibility

Designed as a standard 6-inch 16R double square rule suitable for use in metalworking, toolroom, and precision fabrication applications where fractional and decimal inch graduations are required on a single blade.

Installation Notes

No installation is required for this hand measuring tool. Store the rule in a protective sleeve or case when not in use to prevent edge damage and maintain graduation legibility. Clean the blade with a dry cloth after use to prevent corrosion on the hardened steel surface. Inspect graduations periodically for wear if the rule is used in high-volume layout operations.