Mitutoyo 611152-541 Steel Gauge Block 0.112" Rectangular Grade AS-1

The Mitutoyo 611152-541 is a 0.112" rectangular steel gauge block manufactured to Grade AS-1 (ASME B89.1.9 Grade 1) tolerances. Gauge blocks — also known as gage blocks or slip gauges — are precision measurement standards used for calibrating measuring instruments, setting comparators, and verifying dimensional accuracy in metrology and quality control applications.

Constructed from high-carbon, high-chrome steel, this gauge block delivers exceptional hardness and long-term wear resistance, maintaining its precise nominal dimension even under repeated use. The rectangular geometry provides flat, parallel, and highly polished measuring faces that allow for accurate wringing — the process of bonding gauge blocks together without fasteners to achieve compound measurements.

Key Features:

• Nominal Size: 0.112 inches
• Shape: Rectangular (RECT)
• Material: High-carbon, high-chrome steel
• Grade: AS-1 (ASME B89.1.9 Grade 1) — high-accuracy inspection grade
• Identification number etched directly into the block for full traceability
• Rectangular base geometry ensures consistent, accurate wringing to other blocks
• High hardness and wear resistance for extended service life
• Polished measuring faces for tight surface contact and minimal wringing error

Mitutoyo gauge blocks are trusted worldwide in dimensional metrology for their consistent accuracy and compliance with international measurement standards. The Grade AS-1 designation meets stringent ASME tolerances, making this block suitable for use as a calibration or inspection standard in laboratory and shop floor environments.