Spi 13-955-0 Flexible Steel Rule 36 Inches 16R

Product Description

The SPI 13-955-0 is a 36-inch flexible steel rule designed for precision layout and measurement work across fabrication, machining, and general trades. The rule carries four graduation scales — 1/32, 1/64, 1/50, and 1/100 inch — in a 16R graduation style, making it suitable for both fractional and decimal inch work. The satin chrome-plated finish reduces glare under shop lighting and provides corrosion resistance during regular handling. At 0.020 inches thick and 3/4 inches wide, the blade has enough flexibility to conform to contoured surfaces without losing structural integrity. Machinists, pipefitters, sheet metal workers, and general tradespeople keep this rule as a bench and layout staple.

This rule is suited to shop and field applications where multiple graduation scales are needed on a single tool. The 16R pattern is a standard among machinists and tool-and-die work, providing both fractional and decimal inch reference without switching tools. The 36-inch overall length covers full-sheet layout tasks and longer part measurements that shorter 6- and 12-inch rules cannot handle. It is used horizontally with a scale orientation designed for straightforward direct reading along the blade.

Key Features

• Four graduation scales on one blade: 1/32, 1/64, 1/50, and 1/100 inch
• 16R graduation style for machinist and layout applications
• Flexible construction allows measurement along curved or contoured surfaces
• Satin chrome-plated finish reduces glare and resists corrosion
• 36-inch overall length with 3/4-inch width for stable, easy reading
• Non-magnetic, no hook — clean bench and layout tool

Compatibility

Designed as a general-purpose flexible steel rule for machinist, fabrication, and trade layout applications requiring 16R graduation in a 36-inch format.

Installation Notes

No installation is required for this measuring tool. Store the rule flat or hanging to prevent permanent set in the blade. When using the flexibility feature, apply even, controlled pressure to avoid kinking the blade. Keep the scale surface clean and free of cutting fluid buildup to maintain graduation legibility.