The VÖLKEL Precision Thread Ring Gauge NPT 1/4 x 18 is designed for manual inspection of tapered pipe threads in accordance with ANSI/ASME B 1.20.1. It ensures that internal threads meet the required dimensional accuracy at a reference temperature of 20 °C. A factory calibration certificate is available on request.
| Standard | ANSI / ASME B 1.20.1 |
| Thread Type | NPT 1/4 x 18 |
| Article Number | 16486 |
| EAN | 4022835164869 |
| Reference Temperature | 20 °C |
| Calibration | Optional factory calibration certificate |
How tight should I screw the gauge?
Only by hand – without any tools or extensions.
What does “GO” mean?
The GO ring must screw in smoothly; if it doesn’t, the thread is out of tolerance. NO-GO rings must not engage.
What is the L1 mark for?
It indicates the correct hand-tight engagement point for NPT thread inspection.
How often should I recalibrate?
Depending on usage and quality standards; VÖLKEL provides calibration services on request.
Which cleaning agents should be used?
Use a clean lint-free cloth or alcohol; avoid aggressive solvents or abrasives.
Need help with selection or calibration? Contact our team via the contact form.
| Type of thread | american tapered pipe thread, taper 1:16 |
|---|---|
| Standard | ANSI /ASME B 1.20.1 |
| Size | NPT 1/4 x 18 |
| EAN | 4022835164869 |
| Item number | 16486 |
| Gauge dimension | ANSI /ASME B 1.20.1 |
| Thread standard | ANSI B1.20.1 |
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