Dispatch Hours
Orders dispatched Monday to Friday between 8am and 5pm (4:30pm on Fridays).
- Mon – Thurs8:00 – 17:00
- Friday8:00 – 16:30
- Sat & SunClosed
JBO
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Authorised UK Distributor
JBO Thread Ring Gauges (NoGo)
Electrical Conduit
These ring gauges play a crucial role in ensuring accurate and reliable measurements of external thread diameters in industries such as manufacturing, automotive, and aerospace. With their meticulous design and precise dimensions, they facilitate efficient inspection of threaded components, verifying their compliance with Unified thread standards and specifications. The no-go design allows for easy identification of non-conforming threads, ensuring proper fitment and functionality. Crafted from high-quality materials like hardened steel.
Click any SKU to view full product details, specifications and datasheets.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-506013 | M8 | 1 | £62.07 | 5 days |
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| JBO-506014 | M10 | 1 | £66.66 | 5 days |
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| JBO-506015 | M12 | 1.5 | £71.37 | 5 days |
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| JBO-506016 | M16 | 1.5 | £75.85 | 5 days |
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| JBO-506017 | M20 | 1.5 | £85.03 | 5 days |
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| JBO-503871 | M25 | 1.5 | £90.91 | 5 days |
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| JBO-503872 | M32 | 1.5 | £102.76 | 5 days |
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| JBO-506018 | M40 | 1.5 | £128.20 | 5 days |
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| JBO-506019 | M50 | 1.5 | £154.90 | 5 days |
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| JBO-506020 | M63 | 1.5 | £196.56 | 5 days |
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| JBO-506021 | M75 | 1.5 | £238.22 | 5 days |
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Built around the way engineers work
Fast dispatch, clear delivery options and a friendly technical team on the end of the phone.
UK Delivery
FREE next day delivery on mainland UK orders over £50 ex VAT
| Service | Cost |
|---|---|
| Royal Mail Tracked 24 | £5.90 |
| DPD Standard Next Day | £8.00 |
| Royal Mail Special Delivery by 1pm | £12.50 |
| DPD Saturday Delivery | £25.00 |
Saturday delivery available on orders placed before 4pm Friday. T&Cs and geographical exclusions apply (Republic of Ireland, Northern Ireland, Scottish Highlands, Channel Islands & others) — see our delivery page for full details.
Easy Returns
If an item isn't right, sending it back is simple and hassle-free.
Read our returns policy →Need Technical Help?
Our specialist team can advise on tooling choice, specifications and compatibility.
01732 887334 info@protool-ltd.co.ukMon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30
