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JBO Plug Gauge - UNF (STI) Heli Coil Gauge - Right Hand - 3B - 1/4 x 28 - Calibrated (DAkkS Calibration)
| Thread Form | UNF (STI) |
| Size | 1/4 |
| Pitch | 28 |
| Gauge Type | Plug Gauge (D/E) |
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Description
The JBO Plug Gauge for UNF (STI) Helicoil inserts is a precision measurement tool designed to verify that threaded inserts meet exact size and fit requirements. This right-hand gauge, configured as 3B with a 1/4 x 28 size, is calibrated for traceability with DAkkS calibration and is manufactured in accordance with ANSI/ASME thread standards. It’s built to deliver reliable checks during production, quality control, and maintenance, helping you ensure inserts will assemble correctly in real-world applications.
- DAkkS-calibrated, ANSI/ASME-compliant: Provides traceable, accurate measurements that align with accepted thread standards, delivering consistent results across production lots.
- Precise pitch-diameter verification: Enables reliable measurement of the critical pitch diameter to confirm proper fit and performance of threaded inserts in assemblies.
- Rugged, right-hand design with knurled grip: Built for daily use in busy workshops, offering durability and comfortable handling for repeat inspections.
This plug gauge streamlines quality checks by delivering dependable, repeatable measurements, reducing inspection time and the risk of misfits. With DAkkS calibration backing its accuracy, you can trust the gauge to support tighter tolerances and more consistent results in manufacturing, automotive, and aerospace environments.
Part Numbers
- Protool Part Number
- JBO-512713
- 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 Plug Gauge UNC Heli Coil - Right Hand - 3B - Calibrated (DAkkS Calibration)
View full collection →You are viewing JBO-512713. Click any other SKU to view its full details.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512689 | No. 2 | 56 | £167.77 | 5 days | |
| JBO-512692 | No. 4 | 40 | £214.08 | 5 days | |
| JBO-512694 | No. 5 | 40 | £212.97 | 5 days | |
| JBO-512695 | No. 6 | 32 | £197.63 | 5 days | |
| JBO-512697 | No. 8 | 32 | £189.95 | 5 days | |
| JBO-512687 | No. 10 | 24 | £187.75 | 5 days | |
| JBO-512688 | No. 12 | 24 | £204.20 | 5 days | |
| JBO-512700 | 1/4 | 20 | £187.75 | 5 days | |
| JBO-512703 | 5/16 | 18 | £197.63 | 5 days | |
| JBO-512702 | 3/8 | 16 | £211.89 | 5 days | |
| JBO-512699 | 1/2 | 13 | £306.19 | 5 days | |
| JBO-512704 | 5/8 | 11 | £319.34 | 5 days | |
| JBO-513095 | No. 4 | 48 | £227.23 | 5 days | |
| JBO-512707 | No. 6 | 40 | £206.40 | 5 days | |
| JBO-512709 | No. 8 | 36 | £195.44 | 5 days | |
| JBO-512705 | No. 10 | 32 | £187.75 | 5 days | |
| JBO-512712 | 1/4 | 28 | £187.75 | 5 days | |
| JBO-512716 | 5/16 | 24 | £197.63 | 5 days | |
| JBO-512715 | 3/8 | 24 | £211.89 | 5 days | |
| JBO-513343 | 7/16 | 20 | £246.96 | 5 days | |
| JBO-512711 | 1/2 | 20 | £306.19 | 5 days | |
| JBO-512718 | 5/8 | 18 | £316.05 | 5 days | |
| JBO-512693 | No. 4 | 40 | £298.51 | 5 days | |
| JBO-512696 | No. 6 | 32 | £274.37 | 5 days | |
| JBO-512698 | No. 8 | 32 | £263.41 | 5 days | |
| JBO-512706 | No. 10 | 32 | £259.03 | 5 days | |
| JBO-512713 Viewing | 1/4 | 28 | £259.03 | 5 days | |
| JBO-512717 | UNF (STI) | 5/16 | £275.48 | 5 days |
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