This GO thread plug gauge is used to verify an internal ISO metric thread M 60 x 2.0 with tolerance class 6H during production inspection, incoming goods inspection, and maintenance checks. You select this gauge by matching the thread designation, pitch, and tolerance class to the internal thread specification, because a GO gauge confirms functional acceptability rather than providing a measured size.
The M designation identifies an ISO metric thread system widely used in machine building, plant engineering, fixture production, and repair work. The 6H tolerance class belongs to the internal thread specification, so this gauge is chosen when you need a direct acceptance check for a finished internal thread under clean conditions, careful handling, and correct alignment at the thread entry.
- Verify the acceptance of internal threads with designation M 60 x 2.0 and tolerance class 6H by GO inspection.
- Use for in process inspection, incoming goods inspection, and final inspection where a fast release decision is required.
- Apply in machine building, metalworking, maintenance, and plant engineering where the internal thread must assemble correctly with the mating part.
- Select this gauge only when thread family, nominal size, pitch, and tolerance class match the drawing or inspection plan.
- Use manual handling with straight alignment at the thread entry, because a thread gauge is an inspection tool and not a cutting tool.
Note Keep the gauge clean, protected against impact, and lightly preserved against corrosion, because contamination and damage can change the inspection result.
- Provides a direct GO acceptance check for one defined internal thread specification.
- Supports repeatable inspection decisions in routine workshop and quality control processes.
- Reduces interpretation effort compared with dimensional measurement during standard acceptance checks.
- Helps identify process drift after tool changes, machine adjustments, or wear in the threading process.
- Separates thread inspection from thread production, which improves process discipline in quality relevant operations.
Drawbacks
- Limited to one exact thread designation and tolerance class, so it cannot cover adjacent variants.
- Requires clean, undamaged threads and careful handling, otherwise you can get a misleading inspection result.
- Clean the internal thread and remove burrs, loose particles, and excess lubricant.
- Confirm that the component specification calls for an internal thread M 60 x 2.0 with tolerance class 6H.
- Align the GO plug gauge carefully with the thread axis at the thread entry.
- Start the gauge by hand with even, light turning force.
- Continue the check only while the gauge runs freely in line with the thread axis.
- Stop immediately at early resistance and inspect the thread condition instead of forcing the gauge.
- Record the inspection result and return the cleaned gauge to protected storage after use.
- 1 piece Precision GO Thread Plug Gauge (Tol. 6H) - M 60 x 2.0
- Product type: GO thread plug gauge
- Inspection target: Internal thread
- Thread system: ISO metric thread M
- Thread size: M 60 x 2.0
- Tolerance class: 6H
- Inspection principle: Functional GO acceptance check
- What does this GO thread plug gauge check?
- This gauge checks whether an internal thread with designation M 60 x 2.0 and tolerance class 6H is functionally acceptable on the GO side. It is intended for acceptance inspection and not for dimensional measurement.
- How do you select the correct gauge for your application?
- The correct selection starts with an exact match of thread family, nominal size, pitch, and tolerance class. You also need to confirm that you are inspecting an internal thread, because internal threads use plug gauges while external threads use ring gauges.
- What does the designation M mean on this product?
- M identifies an ISO metric thread system. This thread system is common in machine building, maintenance, and general industrial assemblies, so the gauge is intended for internal metric threads and not for inch thread systems such as UNC, UNF, NPT, or BSPT.
- What does tolerance class 6H mean for this gauge?
- 6H is the tolerance class of the internal metric thread that the gauge is intended to inspect. You should match the tolerance class on the gauge to the tolerance class specified on the drawing or inspection document, otherwise the inspection result does not correspond to the required acceptance criterion.
- Can this gauge replace a measuring instrument?
- No. This gauge gives you a functional acceptance result for one defined thread specification, but it does not provide numeric measurement values for pitch diameter, flank geometry, or other dimensional details.
- What should you check before ordering this gauge?
- Confirm four points before ordering: internal or external thread, thread family, nominal size with pitch, and tolerance class. For this product, the required combination is internal thread, ISO metric M, M 60 x 2.0, and tolerance class 6H.
- What should you do if the gauge stops early during inspection?
- Stop the check immediately and inspect the thread condition first. Early resistance can result from dirt, burrs, thread damage, incorrect thread data, or process drift in the threading operation, and forcing the gauge can damage both the workpiece and the inspection tool.
- Where can you find additional information for this product family?
- VG 23 catalog as PDF
Do you need help selecting or using the product?
Use the contact form.
In this category: Thread gauges
Related: Thread repair solutions for rejected or damaged threads
