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JBO Plug Gauge - UNC (STI) Heli Coil Gauge - Right Hand - 2B - No. 2 x 56 - Calibrated (DAkkS Calibration)

SKU:JBO-512689

The JBO Plug Gauge for UNC (STI) wire inserts is a precision measuring tool designed to verify UNC STI threaded inserts. This right-hand gauge, sized No. 2 x 56 with a 2B tolerance, is calibrated... Read more ↓
Thread FormUNC (STI)
SizeNo. 2
Pitch56
Gauge TypePlug Gauge (D/E)
Thread DirectionRight Hand
Tolerance2B
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£167.77
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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The JBO Plug Gauge for UNC (STI) wire inserts is a precision measuring tool designed to verify UNC STI threaded inserts. This right-hand gauge, sized No. 2 x 56 with a 2B tolerance, is calibrated to deliver reliable, repeatable measurements on busy shop floors and in QA labs.

Manufactured and assessed in accordance with ANSI/ASME UNC thread standards, these gauges support accurate pitch-diameter checks for Helicoil-style inserts across manufacturing, automotive, and aerospace applications. The DAkkS-calibrated designation provides traceable measurement accuracy for quality records and audits.

  • DAkkS-calibrated for traceable accuracy: ensures measurements are linked to national standards, supporting QA documentation and reliable audit trails.
  • UNC (STI) compatibility for precise pitch-diameter checks: specifically built to gauge UNC STI inserts, enabling confident verification of fit and function.
  • Durable, easy-to-use construction: robust, knurled body and precision-machined ends deliver durable performance and consistent readings in tight workspaces.

Using the JBO UNC (STI) Plug Gauge helps you quickly confirm correct insert fit, streamline inspection workflows, and maintain consistent results across production runs. Its traceable calibration and standards-based design support accurate quality metrics and dependable performance in manufacturing, automotive, and aerospace environments.

Thread Form UNC (STI)
Size No. 2
Pitch 56
Gauge Type Plug Gauge (D/E)
Thread Direction Right Hand
Tolerance 2B
Calibration DAkkS Calibration Cert

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.

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Staff are very helpful and interested in providing a good service making us the customer feel valued.
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honest about stock and prices are competitive.
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Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
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Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
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Full Range: JBO Plug Gauge UNC Heli Coil - Right Hand - 3B - Calibrated (DAkkS Calibration)

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You are viewing JBO-512689. Click any other SKU to view its full details.

Product SKUSizePitchPriceStock Order
JBO-512689 ViewingNo. 256£167.77 5 days
JBO-512692 No. 440£151.32 5 days
JBO-512694 No. 540£150.21 5 days
JBO-512695 No. 632£134.87 5 days
JBO-512697 No. 832£127.21 5 days
JBO-512687 No. 1024£124.99 5 days
JBO-512688 No. 1224£141.45 5 days
JBO-512700 1/420£124.99 5 days
JBO-512703 5/1618£134.87 5 days
JBO-512702 3/816£149.13 5 days
JBO-512699 1/213£243.43 5 days
JBO-512704 5/811£256.58 5 days
JBO-513095 No. 448£164.47 5 days
JBO-512707 No. 640£143.64 5 days
JBO-512709 No. 836£132.68 5 days
JBO-512705 No. 1032£124.99 5 days
JBO-512712 1/428£124.99 5 days
JBO-512716 5/1624£134.87 5 days
JBO-512715 3/824£149.13 5 days
JBO-513343 7/1620£184.22 5 days
JBO-512711 1/220£243.43 5 days
JBO-512718 5/818£253.31 5 days
JBO-512693 No. 440£235.75 5 days
JBO-512696 No. 632£211.63 5 days
JBO-512698 No. 832£200.65 5 days
JBO-512706 No. 1032£196.27 5 days
JBO-512713 1/428£196.27 5 days
JBO-512717 UNF (STI)5/16£212.72 5 days

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