Precision Thread Ring Gauge - NPT 1.1/4 x 11.5

• Check threads with a functional limit gauging method for routine inspection decisions.
• Use in production control, incoming inspection, and maintenance workflows where a fast pass or fail result is required.
• Select by thread designation as stated in the product name: NPT 1.1/4 x 11.5.
• Thread system reference: NPT.
• Apply manual engagement only and stop when resistance becomes significant, without forcing the gauge.
• Keep threads and gauge surfaces clean to reduce measurement risk and wear.

Note Clean the functional surfaces after use and store the product protected from contamination.

• Efficient limit gauging for thread inspection workflows
• Repeatable results with controlled manual engagement
• Supports documentation of inspection outcomes
• Helps reduce scrap from undetected thread issues

• Limit gauge only, it does not provide the numeric deviation from nominal
• Not intended for automated gauging without a dedicated fixture

1. Clean the thread and remove debris, chips, and residual lubricant.
2. Wipe the gauge measuring surfaces and visually check for contamination.
3. Align the gauge straight to the thread axis and start engagement by hand.
4. Turn the gauge with steady manual torque and stop when resistance becomes significant.
5. Interpret the result according to the GO or NO GO function stated for the gauge type.
6. Document the inspection outcome and segregate nonconforming parts.
7. Clean the gauge after use and store it protected from impact and corrosion.

Scope of supply is not listed for this item in the product data file.

• Product class: Thread gauges and inspection
• Gauge type: Thread ring gauge
• Thread system: NPT
• Thread designation: NPT 1.1/4 x 11.5

How do you select the correct gauge?
Match the thread designation and tolerance class in the product name to the drawing requirement. Confirm the thread system if it is stated in the product name.

How do you avoid false inspection results?
Clean thread and gauge surfaces, align the gauge to the axis, and apply controlled manual torque only. Avoid forcing the gauge through resistance.

What does GO and NO GO mean for thread gauging?
GO verifies the functional fit condition within limits. NO GO verifies the reject limit and must not engage beyond the allowance defined by your inspection practice.

Do you need calibration documentation for traceability?
Depending on your quality system, you can use calibrated gauges and documented inspection intervals. Define intervals based on usage and risk.

How do you maintain the gauge in service?
Clean after use, protect from impact, and store dry with light corrosion protection. Replace the gauge if damage or wear is suspected.

Where can you find additional information in the VÖLKEL gauge catalog?
Use the catalog for overview information and selection guidance: VG 23 catalog as PDF