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JBO Plug Gauge - Metric (STI) Heli Coil Gauge - Right Hand - 6H - M18 x 2.5 - Calibrated (DAkkS Calibration)

SKU:JBO-512674

The JBO Plug Gauge - Metric (STI) is a precision tool designed to verify metric-sized screw thread inserts (STIs). It’s ideal for engineers, manufacturers, inspectors, and shop-floor technicians ... Read more ↓
Thread FormMetric (STI)
SizeM18
Pitch2.5
Gauge TypePlug Gauge (D/E)
Thread DirectionRight Hand
Tolerance6H
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£246.71
Prices shown ex. VAT
5 days estimated lead time — subject to availability
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Free delivery over £50 ex VAT
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The JBO Plug Gauge - Metric (STI) is a precision tool designed to verify metric-sized screw thread inserts (STIs). It’s ideal for engineers, manufacturers, inspectors, and shop-floor technicians who need fast, reliable checks to confirm inserts meet exact metric STI standards and specifications.

This gauge is manufactured and assessed to ANSI/ASME thread system standards and is calibrated with DAkkS calibration. It features a right-hand configuration for M18 x 2.5 inserts with a 6H tolerance, enabling accurate, repeatable inspections in production, quality control, and maintenance workflows.

  • DAkkS-calibrated for traceable accuracy: provides auditable, high-precision measurements you can trust across batches and audits.
  • Metric STI compatibility (M18 x 2.5, 6H, right-hand): ensures consistent go/no-go verification of standard metric thread inserts and their installation performance.
  • Rugged, user-friendly design: knurled body with durable end fittings delivers secure handling and long service life in busy workshop environments.

Use this plug gauge to streamline quality checks, reduce rework, and maintain consistent, compliant insert installations across manufacturing, automotive, and aerospace applications. Its calibrated accuracy helps you make confident pass/fail decisions, save time on inspection, and uphold reliable performance in demanding environments.

Thread Form Metric (STI)
Size M18
Pitch 2.5
Gauge Type Plug Gauge (D/E)
Thread Direction Right Hand
Tolerance 6H
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.

★★★★★
Nice experience staff are very helpful and interested...
Staff are very helpful and interested in providing a good service making us the customer feel valued.
Bill
★★★★★
first place we look
honest about stock and prices are competitive.
Phil
★★★★★
Polite and helpful
Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
Graham
★★★★★
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.
Jeremy

Full Range: JBO Metric Plug (STI) Heli Coil Gauges - Right Hand - Calibrated (DAkkS Calibration)

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You are viewing JBO-512674. Click any other SKU to view its full details.

Product SKUSizePitchPriceStock Order
JBO-512675 M20.4£127.21 5 days
JBO-512676 M2.50.45£118.42 5 days
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