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
Carmex
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Authorised UK Distributor
Carmex Thread Turning Holders
Internal - 3.5 Helix Angle
These holders are crafted with a 3.5-degree helix angle, tailored to enhance the efficiency and quality of internal threading operations. Their precision engineering ensures accurate and consistent thread cutting, accommodating a variety of thread profiles. Carmex Internal Thread Turning Holders with 3.5 Helix Angle are reliable tools, well-suited for industries like automotive, aerospace, and manufacturing, enabling machinists to achieve precise internal threads with improved chip control and reduced cutting forces due to the optimized helix angle, resulting in higher machining efficiency and quality.
Browse all 1 products
Click any SKU to view full product details, specifications and datasheets.
| Product SKU | Type | Internal or External | Minimum Bore | Shank Size | Hand | Overall Length | Insert | Reach | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|---|---|
| SIR0016P16B-3.5 | 3.5 Helix Angle | Internal | 19 | 20 | Right | 170 | 16IR | 40 | £54.72 | 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
