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JBO Thread Plug Gauge (Go/NoGo) - NPT - Right Hand - 4 x 8
| Thread Form | NPT |
| Size | 4 |
| Pitch | 8 |
| Gauge Type | Plug Gauge (Go/NoGo) |
| Thread Direction | Right Hand |
| Tolerance | N/A |
Learn more about Klarna
The JBO Thread Plug Gauge (Go/NoGo) for NPT, Right Hand, Model 4 x 8, is a precision inspection tool designed for plumbers, manufacturers, and field technicians who rely on accurate pipe connections. Built for right-hand NPT threads, it helps verify that fittings meet required standards and will seal properly in service. The knurled, metal body provides a secure grip for precise placement, even in oily or wet conditions.
- Go/NoGo design for quick conformance checks: Instantly distinguish between conforming and non-conforming threads, reducing guesswork and ensuring proper fit and sealing on first assembly.
- Hardened steel construction for durability: Built to withstand daily use in harsh workshop and field environments, delivering reliable performance over a long service life.
- Ergonomic knurled grip and right-hand alignment: Easy, secure handling with precise alignment to standard NPT fittings, improving accuracy and reducing hand fatigue during inspection.
This plug gauge helps you streamline quality control, accelerate assemblies, and deliver leak-free, reliable pipe connections across plumbing, oil and gas, and manufacturing applications.
| Thread Form | NPT |
| Size | 4 |
| Pitch | 8 |
| Gauge Type | Plug 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 Plug Gauges - NPT Go/No-Go
View full collection →You are viewing JBO-512511. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512502 | 1/16 | 27 | £163.45 | 5 days | |
| JBO-512505 | 1/8 | 27 | £153.83 | 5 days | |
| JBO-512504 | 1/4 | 18 | £163.45 | 5 days | |
| JBO-512510 | 3/8 | 18 | £175.20 | 5 days | |
| JBO-512503 | 1/2 | 14 | £192.29 | 5 days | |
| JBO-512509 | 3/4 | 14 | £216.86 | 5 days | |
| JBO-512499 | 1 | 11.5 | £248.91 | 5 days | |
| JBO-512501 | 1 1/4 | 11.5 | £326.89 | 5 days | |
| JBO-512500 | 1 1/2 | 11.5 | £368.55 | 5 days | |
| JBO-512506 | 2 | 11.5 | £451.88 | 5 days | |
| JBO-512507 | 2 1/2 | 8 | £536.27 | 5 days | |
| JBO-512508 | 3 | 8 | £649.50 | 5 days | |
| JBO-522600 | 3 1/2 | 8 | £850.33 | 5 days | |
| JBO-512511 Viewing | 4 | 8 | £966.77 | 5 days |
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