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JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M12 x 1.25 - Calibrated (DAkkS Calibration)
| Thread Form | Metric (STI) |
| Size | M12 |
| Pitch | 1.25 |
| Gauge Type | Plug Gauge (D/E) |
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Description
The JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge is a precision measuring tool designed to verify metric screw thread inserts (STIs). It's built for engineers, machinists, quality teams, and shop-floor technicians who need fast, reliable checks to confirm inserts meet exact size and tolerance for consistent assembly.
This right-hand gauge is sized M12 x 1.25 with a 6H tolerance and is calibrated to DAkkS standards, ensuring traceable, auditable measurements. It follows ANSI/ASME thread guidelines, delivering dependable go/no-go results that support quality systems across manufacturing, automotive, and aerospace applications.
- DAkkS-traceable calibration: Ensures traceable, auditable measurements that satisfy QA documentation and audits, providing confidence in every check.
- Right-hand, metric STI compatibility: Precisely sized for M12 x 1.25 inserts with 6H tolerance, enabling fast, accurate pass/fail checks in right-hand threading contexts.
- Durable, ergonomic construction: Knurled, corrosion-resistant body and robust end features deliver long service life and a secure grip in busy workshop environments.
Using the JBO plug gauge on incoming parts or in-process checks reduces rework by giving you quick, reliable confirmation that inserts meet spec. The calibrated accuracy supports consistent performance across batches, streamlines quality reporting, and helps you maintain tight tolerances without slowing down production.
Part Numbers
- Protool Part Number
- JBO-515572
- 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 Metric Plug (STI) Heli Coil Gauges - Right Hand - Calibrated (DAkkS Calibration)
View full collection →You are viewing JBO-515572. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512675 | M2 | 0.4 | £127.21 | 5 days | |
| JBO-512676 | M2.5 | 0.45 | £118.42 | 5 days | |
| JBO-512679 | M3 | 0.5 | £168.80 | 5 days | |
| JBO-512682 | M4 | 0.7 | £157.61 | 5 days | |
| JBO-512683 | M5 | 0.8 | £154.54 | 5 days | |
| JBO-512685 | M6 | 1 | £154.54 | 5 days | |
| JBO-513473 | M7 | 1 | £204.20 | 5 days | |
| JBO-512686 | M8 | 1.25 | £154.54 | 5 days | |
| JBO-512666 | M10 | 1.5 | £162.44 | 5 days | |
| JBO-512668 | M12 | 1.75 | £194.33 | 5 days | |
| JBO-512671 | M14 | 2 | £223.93 | 5 days | |
| JBO-512673 | M16 | 2 | £240.39 | 5 days | |
| JBO-512674 | M18 | 2.5 | £309.47 | 5 days | |
| JBO-512677 | M20 | 2.5 | £319.34 | 5 days | |
| JBO-513023 | M24 | 3 | £366.49 | 5 days | |
| JBO-513019 | M8 | 1 | £244.77 | 5 days | |
| JBO-513020 | M10 | 1 | £268.90 | 5 days | |
| JBO-515046 | M10 | 1.25 | £319.34 | 5 days | |
| JBO-515572 Viewing | M12 | 1.25 | £327.03 | 5 days | |
| JBO-512670 | M12 | 1.5 | £277.67 | 5 days | |
| JBO-512672 | M14 | 1.5 | £287.55 | 5 days | |
| JBO-513021 | M16 | 1.5 | £296.32 | 5 days | |
| JBO-513975 | M18 | 1.5 | £301.81 | 5 days | |
| JBO-512678 | M20 | 1.5 | £314.96 | 5 days | |
| JBO-513454 | M22 | 1.5 | £329.22 | 5 days | |
| JBO-513146 | M24 | 1.5 | £334.69 | 5 days |
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