Spi 13-461-9 Combination Square Blade 24 Inch

Product Description

The SPI 13-461-9 is a 24-inch combination square blade designed for precise layout and measurement work across a wide range of trade applications. The blade carries both English and metric graduations, with markings at 1/64 inch, 1/32 inch, 0.5 mm, and 1 mm intervals, making it suitable for jobs that require dual-unit referencing on a single tool. A baked enamel coating protects the blade surface from corrosion and wear in shop environments. Machinists, pipefitters, HVAC fabricators, and sheet metal workers commonly rely on this type of blade as a replacement or upgrade component for a standard combination square set.

This blade is used in fabrication shops, mechanical rooms, and field installations where accurate scribing, squaring, and transfer measurements are required. It fits into combination square setups used for both rough layout and finish work. The dual-graduation format reduces the need to switch between separate rules when working with mixed English and metric drawings or specifications. The 24-inch length covers larger workpieces without repositioning.

Key Features

• 24-inch blade length for extended layout reach on large workpieces
• English graduations at 1/64 inch and 1/32 inch for fine imperial measurement
• Metric graduations at 0.5 mm and 1 mm for dual-unit versatility
• Baked enamel coating resists corrosion and surface wear in shop and field conditions
• Compatible with standard combination square heads for scribing, squaring, and depth measurement

Compatibility

Designed as a replacement or supplemental blade for standard combination square sets that accept a 24-inch graduated blade.

Installation Notes

Installation of a combination square blade is performed by machinists, fabricators, or any trade professional maintaining their layout tools. Ensure the square head locking mechanism is fully released before inserting or removing the blade. Inspect the blade channel and head clamp for debris or burrs that could affect seating and accuracy. No special tools or power shutoff procedures are required for blade exchange.