Starrett 51441 Square Straight Edge 36 in Steel

Product Description

The STARRETT 51441 is a square straight edge precision layout and inspection tool used to verify flatness, check surface accuracy, and scribe reference lines on machined parts and fabricated assemblies. Manufactured from steel, it measures 36 inches long, 2-13/32 inches wide, and 7/32 inches thick. Edge flatness is held to 0.0004 inches and parallelism to 0.0012 inches, making it suitable for work where consistent reference accuracy is required. Machinists, tool-and-die technicians, fabricators, and quality control personnel are the primary users of this type of precision straight edge.

The STARRETT 51441 is used across metalworking shops, fabrication facilities, and inspection departments where surface layout and flatness verification are routine tasks. It is well suited for both bench work and machine setup, including use on surface plates, mill tables, and welding fixtures. Its length and precision tolerances make it appropriate for checking medium to large workpieces where a shorter rule or shorter straight edge would not span the full reference surface.

Key Features

• Edge flatness tolerance of 0.0004 inches for reliable precision reference work
• Parallelism held to 0.0012 inches across the full length
• Square edge type for consistent contact along the working edge
• Steel construction for durability and dimensional stability
• 36-inch length accommodates medium to large workpiece inspection and layout

Compatibility

Designed as a general-purpose precision straight edge for metalworking, fabrication, and quality inspection applications requiring a 36-inch steel reference tool.

Installation Notes

Straight edges of this type are handled and stored by machinists and quality technicians who work with precision layout and inspection equipment. Clean the reference surface and the straight edge before use to prevent contamination from affecting flatness readings. Avoid dropping or striking the working edge, as impact damage can compromise the precision tolerances. Store flat or supported along its length to prevent long-term deflection.