Steel Bore Gauges | McMaster-Carr

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1,445 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 Spacing Collars

Inside Hole Micrometer Spacing Collars

Replace the collar on your micrometer to connect extension rods

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

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

Inside/Outside Diameter Gauges

Inside/Outside Diameter Gauges

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

Countersink Gauges

Countersink Gauges

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

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