Bore Gauges | McMaster-Carr

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2,082 Products

Measuring and Inspecting

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

129 products

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

29 products

Inside Hole Micrometer Handles

Screw into your micrometer head to extend its reach for measuring deep holes

1 product

Inside Hole Micrometer Spacing Collars

Replace the collar on your micrometer to connect extension rods

1 product

Inside Hole Calipers

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

12 products

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

1,055 products

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

34 products

Radius Gauges

Check convex and concave radii of tools, patterns, and dies

11 products

Gauge Blocks

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

738 products

Height Gauges

Measure an object's height and mark workpieces for machining

3 products

Chamfer Gauges

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

21 products

Inside/Outside Diameter Gauges

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

2 products

Step Gauges

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

2 products

Countersink Gauges

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

24 products