Mitutoyo 516-903-26 Gage Block Set 81 Pc AS-1 Steel

Product Description

The MITUTOYO 516-903-26 is an 81-piece steel gage block set covering a measurement range of 0.05 inches to 4 inches, graded to AS-1 accuracy per ASME B89.1.9-2002. Each block is individually serialized and shipped with an inspection certificate, making this set suitable for quality control labs, tool rooms, and calibration departments. The set arrives in a fitted wooden case for organized storage and protection. Tolerances vary by size range: 8 microinches for blocks from 0.05 to 0.4 inches, 12 microinches from 0.45 to 1 inch, 16 microinches at 2 inches, 20 microinches at 3 inches, and 24 microinches at 4 inches.

This gage block set is used in precision measurement applications where traceable, certified dimensional references are required. Typical settings include manufacturing facilities, metrology labs, and machine shops. Technicians and quality engineers use these blocks to calibrate measuring instruments, set comparators, verify machined dimensions, and establish reference standards. The four step increment series — 49 blocks at 0.001-inch steps, 19 at 0.05-inch steps, 9 at 0.0001-inch steps, and 4 at 1.000-inch steps — allow a wide range of stack combinations from a single set.

Key Features

• 81-piece steel set covering 0.05 inches to 4 inches in a single case
• AS-1 accuracy grade per ASME B89.1.9-2002
• Four step increment series: 0.0001-inch, 0.001-inch, 0.05-inch, and 1.000-inch
• Tolerances from 8 to 24 microinches depending on block size
• Each block individually serialized for traceability
• Includes inspection certificate and fitted wooden storage case

Compatibility

Designed as a general-purpose precision reference standard compatible with comparators, height gages, and other measuring instruments that accept rectangular steel gage blocks conforming to ASME B89.1.9-2002.

Installation Notes

Gage blocks should be handled by metrology technicians or qualified quality personnel following established wringing and handling procedures to prevent corrosion and surface damage. Clean block surfaces with a lint-free cloth and appropriate solvent before wringing. Store blocks in the provided wooden case when not in use to protect lapped surfaces. Do not use damaged or corroded blocks as dimensional references.