Starrett 50283 Steel Square 6 in Blade 4-5/16 in Base

Product Description

The STARRETT 50283 is a precision steel square used for layout, scribing, and inspection work across metalworking, machining, and fabrication applications. It features a 6-inch blade length and a 4-5/16-inch base length, with beveled edges on both sides for accurate scribing with marking tools. The square is machined to an accuracy of 0.0002 inches, making it suitable for close-tolerance layout work. Constructed from steel, it is built to withstand regular shop use. Machinists, toolmakers, and fabricators rely on this type of square for verifying 90-degree relationships and transferring reference lines on workpieces.

This square is suited for bench-top layout work in machine shops, fabrication shops, and maintenance environments. It is used alongside scribers, height gauges, and surface plates when marking out stock or checking squareness on machined parts. The beveled edges on both sides allow the square to seat cleanly against a reference surface while a scriber traces the blade edge. It is appropriate for both production and one-off toolroom applications where consistent angular reference is required.

Key Features

• Blade length of 6 inches for versatile layout reach
• Base length of 4-5/16 inches provides a stable reference footing
• Accuracy of 0.0002 inches for close-tolerance inspection and scribing
• Beveled on both edges for clean contact with marking tools
• Steel construction for durability in shop environments
• Compatible with standard marking tools for layout work

Compatibility

Designed for use with marking tools in general layout and inspection applications. No specific compatible model numbers or replacement part numbers were provided for this product.

Installation Notes

This square is a hand-use layout and inspection tool and does not require mechanical installation. Keep the reference surfaces clean and free of burrs before use to maintain accuracy. Store the square protected from impact and corrosion to preserve its calibrated edges. Periodic verification against a known reference surface is recommended to confirm ongoing accuracy.