Gap Indicators | McMaster-Carr

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581 Products

Mitutoyo Electronic Calipers

Mitutoyo Electronic Calipers
with Calibration Certificate

Coolant-Resistant Mitutoyo Electronic Calipers

Coolant-Resistant Mitutoyo Electronic
Calipers with Calibration Certificate

Wear-Resistant Mitutoyo Electronic Calipers

Wear-Resistant Mitutoyo Electronic
Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Large-Capacity Mitutoyo Electronic Calipers

Large-Capacity Mitutoyo Electronic
Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Economy Electronic Calipers

Economy Electronic Calipers with Fractional Display

Switch between decimal and fractional measuring increments.

Economy Electronic Calipers

Large-Capacity Economy Electronic Calipers

Deep jaws and extra-long measuring ranges make measuring large material easier.

Left-Handed Electronic Calipers
with Calibration Certificate

The display, markings, and thumb wheel on these calipers are positioned for comfortable left-handed use.

Coolant-Resistant Economy Electronic Calipers

For measuring in and around machines, these calipers won’t be damaged by coolant.

Starrett Electronic Calipers

Starrett Electronic Calipers
with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Coolant-Resistant Starrett Electronic Calipers

Coolant-Resistant Starrett Electronic
Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Dial Calipers

Mitutoyo Dial Calipers

Mitutoyo Dial Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Wear-Resistant Mitutoyo Dial Calipers

Wear-Resistant Mitutoyo Dial
Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Economy Dial Calipers

Economy Dial Calipers with Fractional Display

The dial displays measurements in both decimal and fractional increments.

Wear-Resistant Economy Dial Calipers

Carbide-tipped jaws provide greater wear resistance and longer life when measuring abrasive or very hard materials.

Starrett Dial Calipers

Depth Rods for Starrett Dial Calipers

Attach to 0"-12" Starrett dial calipers to take depth measurements.

Starrett Dial Calipers with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Static-Control Dial Calipers

Protect sensitive electronics from damage while you take accurate measurements.

Vernier Calipers

Economy Vernier Calipers

Locking-Jaw Economy Vernier Calipers

Jaws move only when the thumb lock is depressed.

Fine-Adjustment Economy Vernier Calipers

These calipers have a mechanism which allows you to make finer adjustments.

Fine-Adjustment Mitutoyo Vernier Calipers

These calipers have a mechanism which allows you to make finer adjustments.

Mitutoyo Vernier Calipers

Locking-Jaw Mitutoyo Vernier Calipers

Jaws move only when the thumb lock is depressed.

Slide Ruler Calipers

Starrett Slide Ruler Calipers

Move the jaw along the ruler to take inside and outside measurements.

Economy Slide Ruler Calipers

Take inside and outside measurements by moving the jaw along the ruler.

Calipers for Small Holes and Grooves

The pointed jaws on this caliper can fit into smaller spaces than standard calipers jaws.

Calipers for Small Holes and
Grooves with Calibration Certificate

These calipers come with a calibration certificate traceable to NIST that states they've passed a test for accuracy.

Calipers for Gear Teeth

Precisely measure gear teeth with these dual-scale calipers.

Calipers for Marking

Make accurate marks at precise measurements—these calipers have carbide-tipped jaws that press into workpieces for measuring and marking.

Calipers for Tolerance Checking

Quickly check that parts are within tolerance without resetting the caliper each time.

Calipers for Brakes

Measure wear on disc brakes and pads to determine if you need to replace them.

Precision Measuring Tool Sets

Mitutoyo Electronic Precision Measuring Tool Sets

Read your measurements easily on an LCD. Sets include a Mitutoyo caliper, micrometer, and case.

Mitutoyo Electronic Precision Measuring
Tool Sets with Calibration Certificate

These sets come with calibration certificates traceable to NIST that state the tools have passed a test for accuracy.

Economy Electronic Precision Measuring Tool Sets

Read your measurements easily on an LCD. Sets include a caliper, micrometer, and case.

Starrett Electronic Precision Measuring Tool Sets

Read your measurements easily on an LCD. Sets include a Starrett caliper, micrometer, and case.

Starrett Electronic Precision Measuring
Tool Sets with Calibration Certificate

These sets come with calibration certificates traceable to NIST that state the tools have passed a test for accuracy.

Starrett Precision Measuring Tool Sets

Sets include a Starrett dial caliper, micrometer, ruler, and case.

Starrett Precision Measuring Tool
Sets with Calibration Certificate

These sets come with calibration certificates traceable to NIST that state the tools have passed a test for accuracy.

Economy Precision Measuring Tool Sets

Sets include a dial caliper, micrometer, ruler, and case.

Mitutoyo Precision Measuring Tool Sets

Sets include a Mitutoyo dial caliper, micrometer, ruler, and case.

Feeler Gauge Sets

Economy Feeler Gauge Sets

To keep the set complete, gauge leaves are riveted together in a fan design that folds up for portability.

Starrett Feeler Gauge Sets

Check gaps, alignment, and narrow slots with these feeler gauge sets that include leaves in a variety of thicknesses riveted together in a fan design.

Starrett Feeler Gauge Sets
with Calibration Certificate

To ensure accurate readings, these sets come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.

Color-Coded Feeler Gauge Sets

With leaves that are color coded based on thickness, you can read your measurements at a glance.

Starrett Feeler Gauge Sets for Tight
Spots with Calibration Certificate

A certificate of calibration traceable to NIST states that these sets have passed a test for accuracy.

Starrett Feeler Gauge Sets for Tight Spots

To measure thickness in areas where standard feeler gauges don’t fit, these sets have leaves with narrow ends.

Feeler Gauge Sets for Tight Spots

Leaves have narrow ends to measure thickness where standard feeler gauges can’t fit.

Tapered-Width Feeler Gauge Sets

Width markings on the leaves let you check diameters and widths.

Combination Wire, Width, and
Thickness Feeler Gauge Sets

These sets combine a wire gauge, a tapered-width feeler gauge, and a set of feeler gauges for tight spots in one tool.

Feeler Gauges

Ready-to-Use Feeler Gauges

Gauges are 12” long and have finished ends marked with thickness.

Feeler Gauge Rolls

Cut to your desired length.

Feeler Gauge Assortments

Use these feeler gauge assortments to check gaps, alignment, and narrow slots.

Starrett Tapered-Thickness Feeler Gauges

Check a range of thicknesses with a single tapered gauge.

Starrett Tapered-Thickness Feeler
Gauges with Calibration Certificate

A certificate of calibration traceable to NIST states that this gauge has passed a test for accuracy.

Tapered-Thickness Feeler Gauges

Replace an entire feeler gauge set with one of these tapered gauges that lets you check a range of thicknesses.

Color-Coded Feeler Gauges

Since each thickness is a different color, there’s no need to read the feeler gauge to tell your measurement.

Spark Plug Feeler Gauges

Keep spark plugs working efficiently. These feeler gauges slide between the electrodes to measure the gap.

Plastic Clearance Gauges

Squish these tiny plastic strips between two components to measure the clearance between them. Once compressed, match the widest part of the flattened strip to the markings on the paper gauge. Each marking on the gauge corresponds to a different clearance measurement.