Starrett 51511 Steel Rule 48 Inch 16R Rigid

Product Description

The STARRETT 51511 is a rigid steel rule designed for precise linear measurement in trade and industrial applications. Built from spring steel with a satin chrome-plated finish, this rule measures 48 inches in overall length and 1-1/2 inches in overall width. It carries a 16R graduation style, providing four scales: 1/32, 1/64, 1/100, and 1/50 inch. The horizontal scale orientation and rigid construction make it well-suited for layout work, fabrication, and inspection tasks where a flexible or folding rule would introduce error. The satin chrome finish reduces glare under shop lighting, keeping graduation marks readable during use.

This rule is used by machinists, pipefitters, sheet metal workers, and general fabricators who need a full 48-inch rigid reference for layout, measurement verification, and part inspection. At 48 inches overall length, it spans common structural members and sheet goods without repositioning. The four-scale 16R graduation pattern supports both fractional and decimal inch work, making it practical across a range of trade disciplines where mixed drawing standards are common.

Key Features

• 48-inch overall length provides full-span measurement without repositioning
• 16R graduation style includes 1/32, 1/64, 1/100, and 1/50 inch scales
• Spring steel construction with rigid profile resists flex during layout work
• Satin chrome-plated finish reduces glare and protects against corrosion
• 1-1/2-inch width accommodates four graduation scales side by side for readability
• Horizontal scale orientation supports straightforward linear layout use

Compatibility

Designed as a standard rigid steel rule for general trade and industrial measurement applications requiring a 48-inch length with 16R graduation.

Installation Notes

No installation is required for this rule. Store flat or hang vertically to prevent warping over time. Avoid using the rule as a cutting guide with rotary tools or as a prying device, as edge damage will compromise graduation accuracy. Clean with a dry cloth after use in environments with cutting fluids or metal particulate.