Granite 1-2-3 Step Blocks

Precision Granite brand offers 1-2-3 blocks, also known as Step Blocks, in either Inspection or Laboratory Grades. Either sold individually or in matched pairs.

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

All Six sides finished flat, square, and parallel to each other.

Inspection blocks are within +/-0.00015" of nominal 1" x 2" x 3" size, and 0.0001" of geometric accuracy.

Laboratory blocks are within +/-0.0001" of nominal 1" x 2" x 3" size, and 0.000050" of geometric accuracy.

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, lightening holes, columns, additional features machined into the granite, and threaded inserts!