Granite Master Squares

Precision Granite brand offers Master Squares in either Inspection or Laboratory Grades with either 5 or 6 faces precision finished.

Popular for calibrating CNC Machine Tools, CMMs, and other precision machine tools.

5-Face Master Squares have one large primary side face finished square to the four square edge faces.

6-Face Master Squares have both large primary sides face finished square to the four square edge faces.

Lightening holes are included in the squares.

Standard NIST traceable calibration certificate provided. Optional ISO 17025 certificate available.

Due to shipping costs we ask all granite orders contact us for a quotation to ensure accurate pricing and lead time expectations are communicated.

Many items held in stock in the Precision Granite warehouse, with a 2wk standard lead time on any out of stock or custom orders.

Precision Granite has been providing USA Made granite metrology products to companies worldwide since 1984. Precision Granite is certified ISO 9001, and accredited by A2LA to ISO/IEC 17025, meeting or exceeding requirements of ANSI/NCSL Z540-1, Federal Specification GGG-P-463c, and ASME B89.3.7-2013.

As with all our granite products, feel free to reach out to us regarding special plate sizes, columns, additional features machined into the granite, and threaded inserts!