Spi 13-840-4 Steel Rule 6 Inch 3R Rigid

Product Description

The SPI 13-840-4 is a rigid steel rule designed for precise linear measurement in trade and industrial settings. Finished in satin chrome plating, the 6-inch rule offers clear readability with three graduation scales: 1/32 inch, 1/50 inch, and 1/64 inch. The 3R graduation style presents markings on one side with three rows of increments, giving technicians multiple resolution options on a single tool. At 0.0400 inches thick and 3/4 inch wide, this rule is built for consistent, repeatable reads in layout, fabrication, and inspection work.

This rule suits HVAC technicians, pipefitters, plumbers, electricians, and sheet metal workers who need a compact, dependable measuring tool on the job. The 6-inch length is practical for close-tolerance work in tight spaces, panel layouts, and component measurements. The rigid construction prevents flex-induced read errors, making it a reliable choice for bench work and field service alike.

Key Features

• Three graduation scales: 1/32 inch, 1/50 inch, and 1/64 inch on a single rule
• 3R graduation style with horizontal scale orientation for easy reading
• Rigid construction eliminates measurement error caused by rule flex
• Satin chrome-plated finish reduces glare and resists corrosion
• Compact 6-inch length suited for tight-space and bench measurement tasks
• Non-magnetic, no hook — clean and straightforward layout tool

Compatibility

Designed as a general-purpose steel rule for trade and industrial measurement applications requiring 1/32, 1/50, or 1/64 inch resolution.

Installation Notes

No installation is required for this hand tool. Store the rule in a protective sleeve or tool roll to prevent edge damage and maintain graduation legibility. Wipe clean after use to preserve the satin chrome finish. Inspect graduation markings periodically for wear, especially in high-use fabrication environments.