Mitutoyo 611643-531 Individual Metric Gage Block Rectangular Steel ASME Grade - 3.5mm 0

The Mitutoyo 611643-531 is a 3.5mm individual metric rectangular gage block manufactured from high-carbon, high-chrome steel to ASME B89.1.9-2002 Grade 0 standards. Part of Mitutoyo's Series 516 lineup, this precision block is designed for calibrating and setting test gauges, reference gauges, and length measuring instruments, as well as accurate inspection work in quality control environments.

Key Features:

• ASME Grade 0 accuracy — meets ASME B89.1.9-2002 standards for flatness, length, parallelism, and surface finish
• High-carbon, high-chrome steel construction — provides exceptional hardness (800 HV / 64 HRC) and long-term wear resistance
• Rectangular base geometry — enables accurate wringing for building precise stacked measurements
• Etched identification number — laser-etched block ID supports full measurement traceability
• Certificate of Inspection included — each block ships with documentation confirming compliance to ASME Grade 0 tolerances
• 3.5mm nominal length — metric dimension for use in metric gage block sets and assemblies
• Heat-treated and stress-relieved for high dimensional stability and resistance to secular length change

This individual gage block is ideal for use as a standalone reference standard or as a replacement block within a metric gage block set. Mitutoyo's steel gage blocks are precision lapped for excellent wringing properties, ensuring reliable and repeatable contact when stacking multiple blocks together.