Spi 31-388-2 Stainless Steel Angle Gage 45 135 Degree

Product Description

The SPI 31-388-2 is a stainless steel angle gage used to verify and transfer precise angular measurements during layout, machining, and inspection tasks. It features a 45-degree primary angle and a 135-degree complementary angle, giving technicians two reference surfaces in a single compact tool. Constructed from stainless steel for corrosion resistance and dimensional stability, this gage is suited for use in machine shops, fabrication environments, and quality control applications. Machinists, toolmakers, and inspectors use this type of gage when setting up workpieces, checking miter cuts, or confirming angular tolerances on finished parts.

The 31-388-2 is appropriate for both bench and floor-level inspection work. Its 45-degree and 135-degree reference angles make it particularly useful in metalworking and fabrication shops where square, miter, and obtuse angle verification are routine. The compact form factor allows use in tight setups and on smaller workpieces where a full-size protractor or sine bar is impractical. Toolmakers and QC technicians working to drawing tolerances will find this a reliable quick-check reference tool.

Key Features

• 45-degree primary angle for standard miter and layout reference
• 135-degree complementary angle provides obtuse-angle verification without repositioning the workpiece
• Stainless steel construction resists corrosion and maintains dimensional stability in shop environments
• Single-piece design with no moving parts reduces wear and calibration drift
• Compact size suits tight setups and small-part inspection

Compatibility

Designed as a general-purpose angle reference gage suitable for use in machining, fabrication, and inspection applications requiring 45-degree or 135-degree angle verification.

Installation Notes

No power source or mechanical installation is required for this gage. Clean all mating surfaces before use to prevent debris from affecting angular accuracy. Store in a protective case or designated tool storage to prevent edge damage that could compromise measurement integrity. Periodic calibration against a known reference standard is recommended to confirm ongoing accuracy.