Bore Gauges | McMaster-Carr

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1,645 Products

Measuring and Inspecting

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

Inside Hole Micrometer Handles

Inside Hole Micrometer Handles

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

Inside Hole Micrometer Spacing Collars

Inside Hole Micrometer Spacing Collars

Replace the collar on your micrometer to connect extension rods

Inside Hole Calipers

Inside Hole Calipers

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

Plug Gauges

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

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

Radius Gauges

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

Height Gauges

Measure an object's height and mark workpieces for machining

Gauge Blocks

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

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

Step Gauges

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

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