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 Plug Gauge UNC Heli Coil
Right Hand - 3B - Calibrated (DAkkS Calibration)
The JBO Plug Gauges - UNC (STI) Wire Inserts are precision measuring tools designed specifically for UNC (Unified National Coarse) Screw Thread Inserts (STIs). These plug gauges play a critical role in ensuring accurate and reliable measurements of threaded inserts in industries such as manufacturing, automotive, and aerospace. With their meticulous design and precise dimensions, they enable efficient inspection of threaded inserts, verifying their compliance with UNC STI standards and specifications. The JBO Plug Gauges - UNC (STI) Wire Inserts allow for the measurement of pitch diameter, ensuring the proper fitment and functionality of threaded inserts.
Browse all 28 products
Click any SKU to view full product details, specifications and datasheets.
| Product SKU | Size | Pitch | Price | Stock | Order |
|---|---|---|---|---|---|
| JBO-512689 | No. 2 | 56 | £167.77 | 5 days |
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| JBO-512692 | No. 4 | 40 | £214.08 | 5 days |
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| JBO-512694 | No. 5 | 40 | £212.97 | 5 days |
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| JBO-512695 | No. 6 | 32 | £197.63 | 5 days |
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| JBO-512697 | No. 8 | 32 | £189.95 | 5 days |
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| JBO-512687 | No. 10 | 24 | £187.75 | 5 days |
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| JBO-512688 | No. 12 | 24 | £204.20 | 5 days |
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| JBO-512700 | 1/4 | 20 | £187.75 | 5 days |
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| JBO-512703 | 5/16 | 18 | £197.63 | 5 days |
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| JBO-512702 | 3/8 | 16 | £211.89 | 5 days |
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| JBO-512699 | 1/2 | 13 | £306.19 | 5 days |
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| JBO-512704 | 5/8 | 11 | £319.34 | 5 days |
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| JBO-513095 | No. 4 | 48 | £227.23 | 5 days |
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| JBO-512707 | No. 6 | 40 | £206.40 | 5 days |
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| JBO-512709 | No. 8 | 36 | £195.44 | 5 days |
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| JBO-512705 | No. 10 | 32 | £187.75 | 5 days |
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| JBO-512712 | 1/4 | 28 | £187.75 | 5 days |
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| JBO-512716 | 5/16 | 24 | £197.63 | 5 days |
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| JBO-512715 | 3/8 | 24 | £211.89 | 5 days |
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| JBO-513343 | 7/16 | 20 | £246.96 | 5 days |
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| JBO-512711 | 1/2 | 20 | £306.19 | 5 days |
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| JBO-512718 | 5/8 | 18 | £316.05 | 5 days |
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| JBO-512693 | No. 4 | 40 | £298.51 | 5 days |
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| JBO-512696 | No. 6 | 32 | £274.37 | 5 days |
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| JBO-512698 | No. 8 | 32 | £263.41 | 5 days |
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| JBO-512706 | No. 10 | 32 | £259.03 | 5 days |
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| JBO-512713 | 1/4 | 28 | £259.03 | 5 days |
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| JBO-512717 | UNF (STI) | 5/16 | £275.48 | 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
