Gauge Blocks & Sets
Gauge blocks are precisely finished blocks of known length. This page lists gauge block sets in metric and inch, individual blocks, optical flats and optical parallels. Whole sets suit general calibration work, while single blocks help when one size is missing or worn.
They are used in calibration rooms and toolrooms to verify other instruments. Choose by unit system, the number of pieces in a set, the accuracy grade, and whether you need whole sets or individual sizes to fill gaps.
- Verifying micrometer readings in a calibration room
- Building stacks for precision setups
- Checking surface flatness with optical flats
