Starrett 51488 Steel Rule 72 Inch 4R Rigid

Product Description

The STARRETT 51488 is a rigid spring steel rule measuring 72 inches in overall length and 1-1/2 inches in width. It features a satin chrome-plated finish in silver, providing corrosion resistance and glare reduction for improved readability in shop and field environments. The 4R graduation style delivers four scales of measurement — 1/16, 1/32, 1/64, and 1/8 inch — on a single blade, making it a practical layout and inspection tool for machinists, fabricators, pipefitters, and other trade professionals who need accurate linear measurement across a wide span.

This rule is suited for applications requiring a full 6-foot rigid reference, including structural layout, ductwork fabrication, pipe alignment, and general shop measurement. Its horizontal scale orientation and rigid construction make it appropriate for bench work, marking long runs, or verifying dimensional tolerances on large assemblies. The satin chrome finish minimizes reflection under direct lighting, which is common in machine shops and fabrication facilities. No hook is included, and the blade is non-magnetic.

Key Features

• 72-inch overall length provides full 6-foot coverage in a single rigid blade
• 4R graduation style includes four scales: 1/16, 1/32, 1/64, and 1/8 inch
• Spring steel construction delivers rigidity and durability under repeated use
• Satin chrome-plated finish reduces glare and resists corrosion
• 0.1000-inch blade thickness supports stable flat-surface measurement
• Non-magnetic, no hook — clean profile for layout and inspection work

Compatibility

Designed as a standard rigid steel rule for use in machining, fabrication, plumbing layout, HVAC ductwork, and general trade measurement applications requiring a 72-inch span.

Installation Notes

No installation is required for this measuring tool. Handle the blade edges with care, as the spring steel construction and machined graduations can present sharp edges. Store flat or hang vertically to prevent bending, which could compromise measurement accuracy. Wipe clean after use to preserve the satin chrome finish.