Steel Bore Gauges | McMaster-Carr

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1,813 Products

Measuring and Inspecting

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

104 products

Inside Hole Micrometers

Find the inside diameter of cylinders and rings

27 products

Inside Hole Micrometer Spacing Collars

Replace the collar on your micrometer to connect extension rods

1 product

Plug Gauges

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

1,027 products

Feeler Gauges

Check gaps and alignment between machine parts and other surfaces

23 products

Radius Gauges

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

4 products

Gauge Blocks

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

589 products

Inside/Outside Diameter Gauges

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

2 products

Chamfer Gauges

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

16 products

Countersink Gauges

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

12 products