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JBO Thread Plug Gauge (Go/NoGo) - NPT - Right Hand - 1/4 x 18
| Thread Form | NPT |
| Size | 1/4 |
| Pitch | 18 |
| Gauge Type | Plug Gauge (Go/NoGo) |
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Description
The JBO Thread Plug Gauge (Go/NoGo) is a precision inspection tool designed to verify NPT threaded pipe connections. Sized for 1/4 x 18 right-hand threads, it helps plumbers, manufacturers, and inspectors quickly determine whether fittings will thread properly and seal as intended.
Built for reliability in busy environments, this gauge features a straightforward Go/No-Go design that lets you confirm conformance at a glance, speeding up quality checks and reducing rework during assembly and maintenance.
- Go/No-Go design for fast conformance checks: quickly distinguish between passing and non‑conforming threads, saving inspection time and boosting workflow efficiency.
- NPT 1/4 x 18 right-hand compatibility: precisely sized for common 1/4" NPT fittings, ensuring accurate measurement and reliable fitment in standard pipe systems.
- Hardened steel construction: durable, wear‑resistant material that maintains accurate dimensions through repeated use in demanding workshop environments.
Using the JBO thread plug gauge helps you validate thread quality during installation, sourcing, and servicing. It supports confident selection of fittings, reduces downtime from mismatches, and delivers consistent, repeatable results across projects.
Part Numbers
- Protool Part Number
- JBO-512504
- Brand
- JBO
- Category
- Gauge
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
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-512504. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512502 | 1/16 | 27 | £167.77 | 5 days | |
| JBO-512505 | 1/8 | 27 | £157.90 | 5 days | |
| JBO-512504 Viewing | 1/4 | 18 | £167.77 | 5 days | |
| JBO-512510 | 3/8 | 18 | £179.84 | 5 days | |
| JBO-512503 | 1/2 | 14 | £197.38 | 5 days | |
| JBO-512509 | 3/4 | 14 | £222.60 | 5 days | |
| JBO-512499 | 1 | 11.5 | £255.50 | 5 days | |
| JBO-512501 | 1 1/4 | 11.5 | £335.54 | 5 days | |
| JBO-512500 | 1 1/2 | 11.5 | £378.30 | 5 days | |
| JBO-512506 | 2 | 11.5 | £463.83 | 5 days | |
| JBO-512507 | 2 1/2 | 8 | £550.46 | 5 days | |
| JBO-512508 | 3 | 8 | £666.68 | 5 days | |
| JBO-522600 | 3 1/2 | 8 | £872.83 | 5 days | |
| JBO-512511 | 4 | 8 | £992.35 | 5 days |
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