Internal Calipers | McMaster-Carr

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1,236 Products

Measuring and Inspecting

Inside Hole Calipers

Inside Hole Calipers

Measure hard-to-reach areas, such as internal grooves and slots

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

Inside Hole Micrometers

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

Calipers

Take inside, outside, and depth measurements with more precision than a ruler

Micrometer Check Gauges

Micrometer Check Gauges

Confirm your outside or depth micrometers are accurate

Precision Measuring Tool Sets

Precision Measuring Tool Sets

Multiple precision measuring tools in one convenient case

Depth Micrometers

Depth Micrometers

Measure slots, counterbores, and other holes more precisely than depth gauges

Gauge Blocks

Confirm dies, fixtures, and other workpieces meet precise tolerances and calibrate measuring tools

Step Gauges

Check step height, gap width, and distance between slots to make sure machine and engine parts align

Chamfer Gauges

Check the diameter of chamfered edges to make sure they're within tolerance

Countersink Gauges

Countersink Gauges

Catch sizing errors in countersunk holes to keep fasteners from protruding and creating weak points

Inside/Outside Diameter Gauges

Inside/Outside Diameter Gauges

Mount your variance indicator to measure the diameter of rims, grooves, and shallow holes

Layout Calipers

Layout Calipers

Adjust the legs to measure an object and transfer those measurements to a tool or part

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)