Precision NOGO Thread Ring Gauge (Tol. 6e) - M 20 x 2.5

• Checking finished threads in production, incoming inspection and final inspection
• Separating acceptable threads from nonconforming threads with GO and NOGO logic
• Using fast attribute based inspection when repeatable acceptance decisions are needed on the shop floor

Note Select the product by thread designation, workpiece condition and the holder concept used in your process.

• Fast acceptance checking supports shop floor inspection without full dimensional measurement
• Clear GO and NOGO logic reduces interpretation differences between operators
• Suitable for repeat production where consistent pass fail decisions are required
• Thread inspection can be integrated early into process control and final release routines

• A gauge confirms acceptance status but does not give you a full dimensional analysis of the thread geometry.
• It is primarily an inspection tool and not a correction tool when the thread already fails the check.

1. Clean the gauge and the workpiece thread so that contamination does not influence the check.
2. Align the GO side with the thread axis and engage it by hand without forcing.
3. Continue the GO check only with light, controlled effort until the acceptance condition is clear.
4. Apply the NOGO side in the same aligned manner and stop as soon as resistance confirms the limit condition.
5. Remove the gauge and inspect both thread surfaces if the result feels inconsistent.
6. Record the pass fail result according to your inspection routine and protect the gauge before storage.

• 1 piece Precision NOGO Thread Ring Gauge (Tol. 6e) - M 20 x 2.5

• Product type: Thread gauge
• Thread system: Metric ISO
• Tolerance marking: Tol. 6e
• Gauge side: GO
• Gauge side: NOGO

What do you inspect with Precision NOGO Thread Ring Gauge (Tol. 6e) - M 20 x 2.5?

You inspect whether the finished thread stays within the acceptance limits defined for production control or final inspection.

How does GO and NOGO checking help?

GO and NOGO logic gives you a fast acceptance decision without running a full dimensional measurement on every part.

When should you avoid forcing a gauge?

You should never force a gauge because excessive torque can damage both the gauge and the workpiece thread and can also falsify the inspection result.

Where can you find the catalog entry for this product group?

For catalog level orientation, see VG 23 catalog as PDF.

What should you do before gauging?

Clean the workpiece thread and the gauge, then apply the check with controlled hand force and correct alignment.

Can a thread gauge replace a measuring instrument?

No. A thread gauge is primarily an acceptance tool, while measuring equipment is used when you need actual dimensional values or root cause analysis.