Spi 13-628-3 Spring Steel Square 9 in Blade Workshop Grade

Product Description

The SPI 13-628-3 is a workshop-grade spring steel square used for layout, marking, and verification of 90-degree angles in fabrication, machining, and general trade work. The tool features a 9-inch blade and a 5.5-inch base, both machined from spring steel for rigidity and resistance to wear. Parallel accuracy is 0.0009 inches and square accuracy is 0.0017 inches, meeting workshop-grade specifications. Machinists, pipefitters, sheet metal workers, and general maintenance tradespeople rely on this type of square for fast, repeatable angle checks during fabrication and assembly.

This square is suited for use in machine shops, fabrication facilities, and maintenance environments where consistent right-angle verification is required. The spring steel construction handles the demands of a working shop floor without significant deflection under normal use. The compact 5.5-inch base provides stable footing against a workpiece or reference surface, while the 9-inch blade gives enough reach for most standard layout tasks on flat stock, plate, or structural shapes.

Key Features

• 9-inch blade length for extended reach on layout tasks
• 5.5-inch base length for stable contact against reference surfaces
• Spring steel construction for durability and resistance to bending
• Parallel accuracy of 0.0009 inches
• Square accuracy of 0.0017 inches
• Manufactured to workshop-grade specifications

Compatibility

Designed as a general-purpose workshop-grade precision square for use in machining, fabrication, and maintenance trade applications where 90-degree angle verification is required.

Installation Notes

No power source or lockout procedure is required for layout tools of this type. Keep contact surfaces clean and free of burrs or debris before use to maintain accuracy. Inspect the blade and base for nicks or damage that could affect squareness readings. Store away from moisture to prevent corrosion on the spring steel surfaces.