Spi 13-861-0 Flexible Steel Rule 6 in 4R Graduation

Product Description

The SPI 13-861-0 is a flexible steel rule designed for precise linear measurement in trade and industrial applications. At 6 inches overall length and 1/2 inch wide, this rule is built for close-tolerance work where a rigid rule cannot conform to curved or irregular surfaces. The 4R graduation pattern provides four scales on a single blade: 1/16, 1/32, 1/64, and 1/8 inch, giving the technician multiple resolution options without switching tools. The satin chrome-plated finish reduces glare under shop lighting and resists corrosion. At 0.0200 inch blade thickness, it fits into tight clearances common in precision layout and inspection tasks.

This rule suits applications in HVAC sheet metal layout, plumbing rough-in measurement, electrical panel work, and general mechanical trades where compact, readable measurement tools are required. The horizontal scale orientation keeps graduations easy to read when the rule is laid flat against a work surface. It is equally useful in fabrication shops, maintenance facilities, and field service work where a short, flexible rule handles measurements that a standard rigid rule cannot.

Key Features

• Flexible steel blade conforms to curved and irregular surfaces
• 4R graduation: four scales on one rule (1/16, 1/32, 1/64, and 1/8 inch)
• Satin chrome-plated finish reduces glare and resists corrosion
• 0.0200 inch blade thickness fits into tight clearances
• 6 inch overall length and 1/2 inch width for compact handling
• Non-magnetic, no hook included — clean layout tool

Compatibility

Designed as a general-purpose flexible steel rule suitable for precision layout, inspection, and measurement tasks across HVAC, plumbing, electrical, and mechanical trade applications.

Installation Notes

No installation is required for this measuring tool. Store the rule flat or in a protective sleeve to prevent blade distortion, which can affect measurement accuracy. Avoid using the rule as a cutting guide with sharp blades, as this may damage the graduations and chrome finish. Clean with a dry cloth after use to maintain the finish and legibility of the scale markings.