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Asimeto Plug Thread Gauge (Go/NoGo) - Imperial - Right Hand - ASMEB1.20.1-2013 - 2.1/2 x 8

SKU:690-50-1

Asimeto’s Imperial Go/NoGo plug thread gauge is a precision tool crafted for machinists and quality teams who need fast, reliable verification of internal thread accuracy to the ASMEB1.20.1-2013 ... Read more ↓
Thread FormNPT
Size2.1/2
Pitch8
Gauge TypePlug Gauge (Go/NoGo)
Thread DirectionRight Hand
ToleranceASMEB1.20.1-2013
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£272.46
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4 weeks estimated lead time — subject to availability
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Asimeto’s Imperial Go/NoGo plug thread gauge is a precision tool crafted for machinists and quality teams who need fast, reliable verification of internal thread accuracy to the ASMEB1.20.1-2013 standard. The right-hand design and clear Go/NoGo indicators make it a trusted addition to any inspection station.

  • Go/NoGo capability: quick, decisive checks for internal thread conformity, reducing guesswork and speeding inspection cycles.
  • Imperial sizing: calibrated for standard imperial thread sizes, ensuring compatibility with common fasteners and components.
  • Right-hand gauge: optimized orientation for typical right-handed thread assemblies, improving ergonomics during use.
  • 3-step L3 design: three inspection steps that capture thread depth and tolerance across critical engagement zones for thorough assessment.
  • ASMEB1.20.1-2013 compliant: built to the dimensional and tolerance requirements of the industry standard, supporting consistent quality and traceability.
  • Durable workshop-ready construction: designed for daily use in machining and manufacturing environments while maintaining accuracy through routine handling.

This gauge is ideal for quality control at the point of manufacture or assembly. Use it to confirm that internal threads will accept fasteners properly, support calibration and incoming-inspection programs, and help reduce rework and scrap. It’s a practical choice for machine shops, contract manufacturers, and maintenance facilities that require reliable, easy-to-interpret thread checks.

Thread Form NPT
Size 2.1/2
Pitch 8
Gauge Type Plug Gauge (Go/NoGo)
Thread Direction Right Hand
Tolerance ASMEB1.20.1-2013
Middle Diameter Size 2.76216
Gauge Tolerance ± 0.0004

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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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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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: Asimeto Plug Thread Gauges (Go/NoGo) - Imperial - Right Hand - ASMEB1.20.1-2013

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You are viewing 690-50-1. Click any other SKU to view its full details.

Product SKUSizePitchMiddle Diameter SizeGauge TolerancePriceStock Order
690-40-1 1/16270.28118± 0.0002£74.85 In Stock
690-41-1 1/8270.37360± 0.0002£79.64 4 weeks
690-42-1 1/4180.49163± 0.0002£91.44 4 weeks
690-43-1 3/8180.62701± 0.0002£101.76 In Stock
690-44-1 1/2140.77843± 0.0002£114.66 4 weeks
690-45-1 3/4140.98887± 0.0002£129.78 In Stock
690-46-1 111.51.23863± 0.0003£151.54 In Stock
690-47-1 1.1/411.51.58338± 0.0003£212.37 4 weeks
690-48-1 1.1/211.51.82234± 0.0003£240.02 In Stock
690-49-1 211.52.29627± 0.0003£256.98 4 weeks
690-50-1 Viewing2.1/282.76216± 0.0004£272.46 4 weeks
690-51-1 383.38850± 0.0004£301.59 4 weeks

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