Plug Gauges with Handle
Take go and no-go measurements with the same tool. These gauges have a go gauge on one end, a no-go gauge on the other end, and a handle with bushings. They are used for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting micrometers. All come with a certificate of accuracy traceable to NIST.
Check the minimum hole diameter with the go gauge end, and check the maximum hole diameter with the no-go gauge end. If the go gauge enters the hole and the no-go gauge is unable to enter, the hole is within tolerance.
For technical drawings and 3-D models, click on a part number.
Inch—Class Z
| Choose a Plug Gauge Size | Increment | Go Plug Gauge Tolerance | No-Go Plug Gauge Size Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Specifications Met | Each | |
| 0.0050" to 0.0755" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 5 1/4" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 000000 |
| 0.0760" to 0.1805" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 5 15/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 00000 |
| 0.1810" to 0.2815" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 6 1/8" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 00000 |
| 0.2820" to 0.4065" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 6 19/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 00000 |
| 0.4070" to 0.5105" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 3/16" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 00000 |
| 0.5110" to 0.6355" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 3/16" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 0.6360" to 0.7605" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 17/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 0.7610" to 1.0150" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 17/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
Inch—Class X
| Choose a Plug Gauge Size | Increment | Go Plug Gauge Tolerance | No-Go Plug Gauge Size Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Specifications Met | Each | |
| 0.0040" to 0.0250" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 5 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 000000 |
| 0.0251" to 0.0750" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 5 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.0751" to 0.1800" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 5 15/32" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.1801" to 0.2810" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 6 1/8" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.2811" to 0.4060" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 6 19/32" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.4061" to 0.5100" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 7 3/16" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.5101" to 0.6350" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 7 17/32" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.6351" to 0.7600" | 0.0001" | 0" to 0.00004" | -0.00004" to 0" | 7 21/32" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.7601" to 1.0000" | 0.0001" | 0" to 0.00006" | -0.00006" to 0" | 8 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 000000 |
Metric—Class Z
| Choose a Plug Gauge Size | Increment | Go Plug Gauge Tolerance | No-Go Plug Gauge Size Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Specifications Met | Each | |
| 0.2200 mm to 1.9100 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 5 1/4" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 000000 |
| 1.9200 mm to 4.5700 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 5 15/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 000000000 | 00000 |
| 4.5800 mm to 7.1400 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 6 1/8" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 7.1500 mm to 10.3100 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 6 19/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 10.3200 mm to 12.9500 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 7 3/16" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 12.9600 mm to 16.1300 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 7 17/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 16.1400 mm to 19.3000 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 7 17/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
| 19.3100 mm to 25.6500 mm | 0.01 mm | 0 mm to 0.0025 mm | -0.0025 mm to 0 mm | 7 21/32" | 8 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 00000000 | 00000 |
Metric—Class X
| Choose a Plug Gauge Size | Increment | Go Plug Gauge Tolerance | No-Go Plug Gauge Size Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Specifications Met | Each | |
| 0.1010 mm to 0.3810 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 5 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 0000000 |
| 0.3820 mm to 0.7620 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 5 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 0.7630 mm to 1.9050 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 5 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 1.9060 mm to 4.5720 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 5 1/2" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 4.5730 mm to 7.1370 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 6 1/8" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 7.1380 mm to 10.3120 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 6 3/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 10.3130 mm to 12.9540 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 7 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 12.9550 mm to 16.1290 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 7 1/2" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 00000 |
| 16.1300 mm to 19.3040 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 7 3/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 000000 |
| 19.3050 mm to 25.6540 mm | 0.001 mm | 0 mm to 0.001 mm | -0.001 mm to 0 mm | 8 1/4" | 4 | Rockwell C60 | Tool Steel | ASME B89.1.5 | 0000000 | 000000 |
Plug Gauge Handles
A
B
Add a handle to hold your plug gauge. No need for bushings—one handle fits a range of plug gauge sizes.
For Plug Gauge Size | ||||||||
|---|---|---|---|---|---|---|---|---|
| Inch | Metric | O'all Lg. | Material | Color | End Color | Each | ||
| A | 0.0300" to 0.5000" | 0.7620 mm to 12.7000 mm | 4 3/8" | Aluminum | Green | __ | 00000000 | 000000 |
| A | 0.0300" to 0.5000" | 0.7620 mm to 12.7000 mm | 4 3/8" | Aluminum | Purple | __ | 00000000 | 00000 |
| A | 0.0300" to 0.5000" | 0.7620 mm to 12.7000 mm | 4 3/8" | Aluminum | Red | __ | 00000000 | 00000 |
| A | 0.0300" to 0.5000" | 0.7620 mm to 12.7000 mm | 4 3/8" | Aluminum | Yellow | __ | 00000000 | 00000 |
| A | 0.0300" to 0.5000" | 0.7620 mm to 12.7000 mm | 4 3/8" | Aluminum | __ | __ | 0000000 | 00000 |
| B | 0.0110" to 0.0605" | 0.2800 mm to 1.5100 mm | 4" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.0610" to 0.2505" | 1.5200 mm to 7.7100 mm | 5 3/8" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.2510" to 0.5005" | 7.7200 mm to 12.7100 mm | 6 1/8" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.5010" to 0.6255" | 12.7200 mm to 15.3100 mm | 5 1/2" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.6260" to 0.7505" | 15.3200 mm to 17.8100 mm | 5 3/4" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.7510" to 0.8325" | 17.8200 mm to 20.3700 mm | 5 7/8" | Aluminum | __ | Green, Red | 0000000 | 00000 |
| B | 0.8330" to 1.0150" | 20.3800 mm to 25.4100 mm | 6" | Aluminum | __ | Green, Red | 0000000 | 00000 |
Threaded Plug Gauges
These have a go gauge on one end and a no-go gauge on the other end. They allow you to inspect internal threads on parts. A taperlock handle lets you quickly replace worn gauges.
Check the minimum internal thread size with the go gauge end, and check the maximum internal thread size with the no-go gauge end. A part is within tolerance if it’s easy to thread the go gauge into the part but difficult to thread the no-go gauge more than two turns.
Threads have different classes of fit. Thread fit designates the tightness or looseness of mating threads. For example, inch threads with a 3B fit have tighter tolerances than threads with a 2B fit.
For technical drawings and 3-D models, click on a part number.
Inch
| Thread Size | Thread Type | Pitch Dia. Tolerance | Hardness | Material | Choose a For Thread Fit | Each | |
Class X | |||||||
|---|---|---|---|---|---|---|---|
| 0-80 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 0000000 | |
| 1-72 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 2-56 | UNC | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 3-48 | UNC | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 4-40 | UNC | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 4-48 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 5-40 | UNC | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 6-32 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 6-40 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 8-32 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 8-36 | UNF | -0.0002" to 0.0002" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 10-24 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 10-32 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 12-24 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1/4"-20 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 1/4"-28 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 5/16"-18 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 5/16"-24 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 3/8"-16 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 3/8"-24 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 7/16"-14 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 7/16"-20 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 00000 | |
| 1/2"-13 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1/2"-20 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 9/16"-18 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 5/8"-11 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 5/8"-18 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 3/4"-10 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 3/4"-16 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 7/8"-9 | UNC | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 7/8"-14 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1"-8 | UNC | -0.0004" to 0.0004" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1"-12 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1 1/8"-12 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1 1/4"-7 | UNC | -0.0004" to 0.0004" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
| 1 1/4"-12 | UNF | -0.0003" to 0.0003" | Rockwell C70 | Chrome-Plated Tool Steel | 00000000 | 000000 | |
Metric
| Thread Size | Pitch | Pitch Dia. Tolerance | Hardness | Material | For Thread Fit | Each | |
Class X | |||||||
|---|---|---|---|---|---|---|---|
| M1.6 | 0.35mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 0000000 |
| M2 | 0.4mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M2.5 | 0.45mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M3 | 0.5mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M3.5 | 0.6mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M4 | 0.7mm | -0.005" to 0.005" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M5 | 0.8mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M6 | 1mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M8 | 1mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M8 | 1.25mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M10 | 1.25mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M10 | 1.5mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M12 | 1mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M12 | 1.25mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M12 | 1.5mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M12 | 1.75mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M14 | 1.5mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M16 | 1.5mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M16 | 2mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |
| M18 | 1.5mm | -0.008" to 0.008" | Rockwell C70 | Chrome-Plated Tool Steel | Class 6H | 000000000 | 000000 |