Mitutoyo 516-403-26 Gage Block Set 81 Pc AS-1 Steel

Product Description

The MITUTOYO 516-403-26 is an 81-piece steel gage block set covering a measurement range of 0.05 to 4 inches, manufactured to AS-1 accuracy grade per ASME B89.1.9-2002. The set is built from steel blocks with tight tolerances varying by size range: 8 micro-inches for blocks from 0.05 to 0.4 inches, 12 micro-inches from 0.45 to 1 inch, 16 micro-inches at 2 inches, 20 micro-inches at 3 inches, and 24 micro-inches at 4 inches. Machinists, tool and die makers, quality control technicians, and metrologists rely on sets like this to calibrate measuring instruments, set up machine tools, and verify part dimensions to exacting standards.

This set is suited for use in precision manufacturing environments, inspection rooms, and tool rooms where traceable dimensional measurement is required. The step increments cover four ranges: 49 blocks in 0.001-inch increments, 9 blocks in 0.0001-inch increments, 19 blocks in 0.05-inch increments, and 4 blocks in 1.000-inch increments. This combination allows technicians to wring together a wide variety of target dimensions from a single set. The set comes with a wooden storage case and an inspection certificate, making it suitable for ISO- and NIST-traceable quality programs.

Key Features

• AS-1 accuracy grade per ASME B89.1.9-2002 for high-precision measurement applications
• 81-piece steel set spanning 0.05 to 4 inches in a single kit
• Four step-increment ranges support a broad combination of wrung dimensions
• Tolerances as tight as 8 micro-inches for blocks in the 0.05 to 0.4 inch range
• Each block is individually serialized for traceability
• Includes inspection certificate and wooden storage case

Compatibility

Designed as a general-purpose precision gage block set for use with standard wring-compatible steel block accessories including holders, jaws, and scribing points conforming to ASME B89.1.9-2002 dimensional standards.

Installation Notes

Gage blocks are handled and used by metrology technicians, machinists, and quality inspectors — not installed in the conventional sense, but setup and use require care. Always clean block faces with an appropriate solvent and lint-free cloth before wringing to prevent surface damage and measurement error. Store blocks in the provided wooden case at stable temperature conditions; thermal expansion can affect accuracy, so allow blocks to stabilize to room temperature before use. Never drop or slide blocks across hard surfaces, as nicks or burrs on the lapped faces will compromise wring quality and measurement integrity.