Go/No-Go Gauges | McMaster-Carr

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Unified Standard Class 2A

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2,778 Products

Plug Gauges

Class Z Plug Gauges

Check hole diameters to a tolerance of 0.0001" or 0.0025 mm

32 products

Plug Gauges with Handle

Take go and no-go measurements with a single tool

35 products

Go/No-Go Threaded Plug Gauges with Handle

The handle gives you a good grip to quickly thread and unthread go and no-go gauges

234 products

Class X Plug Gauges

Check hole diameters to a tolerance of 0.00004" or 0.001 mm

40 products

Go/No-Go Hex Plug Gauges with Handle

Confirm hex drives on socket head screws are within tolerance

37 products

Threaded Plug Gauges with Handle for Pipe Threads

Verify whether pipe fitting threads fall within tolerance

65 products

Wear-Indicating Plug Gauges

Show wear patterns so you can tell when you need to calibrate or replace

8 products

Plug Gauge Sets

Keep multiple sizes of plug gauges on hand

200 products

Go/No-Go Helical Insert Threaded Plug Gauges with Handle

Check that holes tapped for helical threads are within tolerance

32 products

Threaded Plug Gauges

Test if internal threads fall within tolerance

140 products

Ball-End Plug Gauges with Handle

The thin stem flexes to check holes and cavities even if they are bent or curved

56 products

Go/No-Go Left-Hand Threaded Plug Gauges with Handle

Check that left-hand threads fall within tolerance

58 products

Target-Size Plug Gauge Sets

A range of sizes to check hole size and location and set micrometers

65 products

Acme Threaded Plug Gauges with Handle

Determine if parts with internal Acme threads are within tolerance

20 products

Other Products

Ring Gauges

Confirm your workpiece's outer diameter or external threads are within tolerance

854 products

Plug Gauge Handles

Add both a go gauge and a no-go gauge to create a custom tool for checking hole diameters

12 products

Gauge Blocks

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

738 products

Ring Gauge Holders

Keep ring gauges still to measure cylindrical parts or threads quickly and repeatedly

17 products

Go/No-Go Outside Diameter Gauges

Snap on rods and shafts to check if their outside diameters are within tolerance

20 products

Bore Gauges

Insert into a hole and expand the contacts to measure diameter

2 products

OSHA/ANSI Safety Gauges

Confirm gaps in bench grinders and machine guards meet OSHA and ANSI safety requirements

3 products

Inside/Outside Diameter Gauges

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

2 products

Force Gauges

Test objects to see how much tension and compression force they can bear

11 products

Plug Gauge Drivers

Test thread tolerance in seconds to save time during high-volume work

7 products

Outside Micrometers

Apply even pressure to objects to measure thickness more precisely than thickness gauges

4 products

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

80 products

Scales

Bench-top, hanging, floor, and conveyor scales

6 products