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JBO Thread Ring Gauge (Go/NoGo) - NPT - Right Hand - 3/8 x 18
| Thread Form | NPT |
| Size | 3/8 |
| Pitch | 18 |
| Gauge Type | Ring Gauge (Go/NoGo) |
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Description
The JBO Thread Ring Gauge (Go/NoGo) for NPT Right-Hand threads in 3/8 x 18 is a precision inspection tool designed to verify threaded pipe connections quickly and accurately. It helps engineers, plumbers, machinists, and maintenance teams confirm that fittings will thread smoothly and seal reliably before installation.
- Go/No-Go design for fast verification: Instantly determine conforming vs non-conforming threads, reducing guesswork and rework in the field or on the shop floor.
- Exact NPT 3/8 x 18 right-hand sizing: Tests the precise thread size and direction used by most plumbing fittings, ensuring accurate fit and reliable sealing.
- Ergonomic ring with knurled edge: Easy to grip and align in tight spaces, supporting quick, repeatable checks during busy jobs.
The JBO Thread Ring Gauge helps you standardize thread verification, speeds up assembly and maintenance tasks, and delivers consistent results across jobs. Use it for incoming inspections, on-site repairs, or routine maintenance to ensure every NPT connection meets both fit and seal expectations with confidence.
Part Numbers
- Protool Part Number
- JBO-502681
- 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 Ring Gauges (Go/NoGo) - NPT
View full collection →You are viewing JBO-502681. 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 Viewing | 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 | 3 1/2 | 8 | £1,211.67 | 5 days | |
| JBO-502683 | 4 | 8 | £1,459.46 | 5 days |
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