The VÖLKEL Precision GO Thread Ring Gauge in UNC 3/8 x 16 (tolerance class 2A) enables quick, accurate, and reliable verification of external thread accuracy. Based on ANSI B1.1 (Unified Inch Screw Threads) and ANSI B1.2 (Gauges & Gaging). Reference temperature: 20 °C. Optional factory calibration certificate available on request.
Testing note: The gauge must fully screw onto the thread by hand at 20 °C without force. Otherwise, the part is out of tolerance.
| Thread | UNC 3/8 x 16 |
| Tolerance Class | 2A (External thread) |
| Standard | ANSI B 1.1 |
| Gauge Dimensions | ANSI B 1.2 |
| Reference Temperature | 20 °C |
| Item Number | 16300 |
| EAN | 4022835163008 |
| Calibration | Optional factory certificate, calibrated on IAC thread scanners |
| Delivery | 1× Precision GO Thread Ring Gauge UNC 3/8-16, Tol. 2A |
Why is the reference temperature 20 °C?
Thermal expansion affects dimensions. 20 °C ensures consistent and comparable measurements.
What is the difference between 2A and 3A?
3A provides a tighter fit with less clearance, used for precision assemblies. 2A is standard for general production.
Can I order it calibrated?
Yes, a factory calibration certificate can be issued upon request.
When is a part considered scrap?
If the GO gauge cannot be fully screwed by hand without force, the thread is out of tolerance.
Do I need extra measuring tools?
No, for GO testing the ring gauge is sufficient. For full dimensional analysis, dedicated measuring equipment is required.
Questions about standards, selection or calibration? Our team will be glad to assist you – please use the contact form.
| Type of thread | Unified coarse thread |
|---|---|
| Standard | ANSI B 1.1 |
| Tolerance | 2A |
| Size | UNC 3/8 x 16 |
| EAN | 4022835163008 |
| Item number | 16300 |
| Gauge dimension | ANSI B 1.2 |
| Thread standard | ANSI B 1.1 |
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