Spi 13-954-3 Flexible Steel Rule 36 Inches 5R

Product Description

The SPI 13-954-3 is a flexible steel rule measuring 36 inches in overall length and 3/4 inches in overall width. Finished in satin chrome plating, the rule provides a glare-reduced silver surface that keeps graduation markings easy to read under shop lighting. Three graduation increments are engraved on the rule: 1/100 inch, 1/32 inch, and 1/64 inch, following the 5R graduation style. At 0.0200 inches thick, the blade has enough flexibility to follow contoured or curved workpiece surfaces without sacrificing consistent measurement accuracy. This type of rule is a daily-use layout and measurement tool for machinists, pipefitters, sheet metal workers, and fabricators.

The 13-954-3 is suited for layout work on flat stock, pipe, tubing, and irregular surfaces where a rigid rule would lose contact with the workpiece. The 36-inch length covers full-width measurements on standard sheet material and long-span layout tasks on structural components. The horizontal scale orientation and satin chrome finish make it appropriate for bench, floor, and field measurement work across light manufacturing, HVAC fabrication, plumbing rough-in, and general trade applications. No hook is included and the rule is non-magnetic.

Key Features

• 36-inch overall length covers full-span layout on standard sheet stock
• 5R graduation style with three scales: 1/100 inch, 1/32 inch, and 1/64 inch
• Flexible blade at 0.0200 inches thick conforms to curved and contoured surfaces
• Satin chrome-plated finish reduces glare and resists corrosion
• 3/4-inch width provides a stable reference edge for scribing and marking
• Non-magnetic with no hook — clean, unobstructed blade for layout use

Compatibility

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

Installation Notes

No installation is required for this measuring tool. Keep the blade clean and free of chips or burrs that could affect measurement accuracy. Store flat or rolled loosely to avoid permanent bends in the flexible blade. Periodic wiping with a light machine oil will protect the chrome-plated finish from surface corrosion in humid shop environments.