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JBO Thread Ring Gauge (Go/NoGo) - NPT - Right Hand - 3 1/2 x 8
| Thread Form | NPT |
| Size | 3 1/2 |
| Pitch | 8 |
| Gauge Type | Ring Gauge (Go/NoGo) |
| Thread Direction | Right Hand |
| Tolerance | N/A |
Learn more about Klarna
The JBO Thread Ring Gauge (Go/NoGo) for NPT, Right Hand, 3 1/2 x 8 is a precision tool designed for professionals who work with threaded pipe connections. Ideal for engineers, plumbers, field technicians, buyers, and hobbyists, this gauge helps confirm that NPT fittings will thread together correctly and seal reliably.
Its meticulous design and precise dimensions enable quick, reliable inspection of threaded fittings, ensuring proper fitment and leak-free performance on every job.
- Go/No-Go quick verification: Quickly distinguish conforming from non-conforming threads, reducing inspection time and preventing misfits.
- NPT standard alignment: Precisely matches NPT thread specifications to help you verify proper fit and sealing tolerances with confidence.
- Rugged daily-use build: Designed for busy workshops and job sites, delivering consistent performance and long service life even in demanding environments.
Using this gauge streamlines your quality checks, minimizes downtime, and supports dependable, repeatable results across projects—from initial assembly to final testing. It gives you clear, tangible benefits: faster inspections, fewer reworks, and greater trust in every threaded connection you deploy.
| Thread Form | NPT |
| Size | 3 1/2 |
| Pitch | 8 |
| Gauge Type | Ring Gauge (Go/NoGo) |
| Thread Direction | Right Hand |
| Tolerance | N/A |
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: JBO Thread Ring Gauges (Go/NoGo) - NPT
View full collection →You are viewing JBO-542056. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-502671 | 1/16 | 27 | £287.29 | 5 days | |
| JBO-502675 | 1/8 | 27 | £266.46 | 5 days | |
| JBO-502673 | 1/4 | 18 | £273.04 | 5 days | |
| JBO-502681 | 3/8 | 18 | £285.10 | 5 days | |
| JBO-502672 | 1/2 | 14 | £310.32 | 5 days | |
| JBO-502680 | 3/4 | 14 | £338.82 | 5 days | |
| JBO-502668 | 1 | 11.5 | £383.79 | 5 days | |
| JBO-502670 | 1 1/4 | 11.5 | £450.66 | 5 days | |
| JBO-502669 | 1 1/2 | 11.5 | £495.63 | 5 days | |
| JBO-502677 | 2 | 11.5 | £606.39 | 5 days | |
| JBO-502678 | 2 1/2 | 8 | £695.20 | 5 days | |
| JBO-502679 | 3 | 8 | £887.08 | 5 days | |
| JBO-542056 Viewing | 3 1/2 | 8 | £1,211.67 | 5 days | |
| JBO-502683 | 4 | 8 | £1,459.46 | 5 days |
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