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JBO Thread Plug Gauge - Trapezoidal Go-No/Go - Right Hand - 7H - Tr. 18 x 4
| Thread Form | Trapez |
| Size | Tr. 18 |
| Pitch | 4 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | 7H |
Learn more about Klarna
The JBO Thread Plug Gauge is a precision inspection tool designed to verify trapezoidal threaded holes meet exact standards. With a built-in Go/No-Go design, it provides quick, authoritative pass/fail checks that help ensure proper fitment and reliable performance in manufacturing, automotive, and aerospace environments.
Designed for professionals who specify trapezoidal thread sizes, this right-hand gauge is tuned to 7H tolerance, delivering consistent measurements across parts and batches. Its compact, durable construction makes it suitable for busy workshops and QA labs.
- Go/No-Go Quick Check: Instantly determine if a thread hole passes or fails spec, speeding inspections and reducing rework.
- Trapezoidal Thread Size (Tr. 18 x 4): Specifically matched to trapezoidal holes, ensuring accurate gauging for this profile.
- Durable, Knurled Construction with 7H Tolerance: Robust, easy-to-hold gauge that delivers repeatable measurements in busy shop environments.
Using this gauge in your QC workflow helps you inspect confidently, speed up assembly and verification, and ensure trapezoidal-threaded components fit correctly the first time. With its Go/No-Go design, right-hand orientation, and tight 7H tolerance, you can rely on consistent results across parts and batches, improving overall quality and throughput.
| Thread Form | Trapez |
| Size | Tr. 18 |
| Pitch | 4 |
| Gauge Type | Plug Gauge (D/E) |
| Thread Direction | Right Hand |
| Tolerance | 7H |
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 - Trapezoidal Go-No/Go
View full collection →You are viewing JBO-512561. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-515056 | Tr. 8 | 1.5 | £194.08 | 5 days | |
| JBO-512549 | Tr. 10 | 2 | £200.65 | 5 days | |
| JBO-514745 | Tr. 11 | 2 | £200.65 | 5 days | |
| JBO-512554 | Tr. 12 | 3 | £201.76 | 5 days | |
| JBO-512557 | Tr. 14 | 3 | £206.14 | 5 days | |
| JBO-512559 | Tr. 16 | 4 | £211.63 | 5 days | |
| JBO-512561 Viewing | Tr. 18 | 4 | £220.40 | 5 days | |
| JBO-512563 | Tr. 20 | 4 | £224.79 | 5 days | |
| JBO-512565 | Tr. 22 | 5 | £236.85 | 5 days | |
| JBO-512566 | Tr. 24 | 5 | £250.01 | 5 days | |
| JBO-512569 | Tr. 26 | 5 | £262.07 | 5 days | |
| JBO-512570 | Tr. 28 | 5 | £274.12 | 5 days | |
| JBO-512571 | Tr. 30 | 6 | £287.29 | 5 days | |
| JBO-512572 | Tr. 32 | 6 | £293.87 | 5 days |
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