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Omega Products Castleated Spanner/Wrench - For ER Collet Chucks with Castle (UM) Nut - ER16
| Collet Size | ER16 |
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Omega Products Castleated Spanners/Wrenches are precision tightening tools designed specifically for ER collet chucks that use a Castle (UM) nut. Sized for ER16 systems, these wrenches ensure a secure, repeatable grip when tightening the castle nut, delivering reliable clamping performance every time.
Ideal for machinists, toolmakers, and maintenance technicians, the spanner’s castleated design matches the UM nut precisely, providing reliable torque transfer and minimizing the risk of slipping during setup. The bright red handles enhance visibility in busy workshops while offering a comfortable, hand-friendly grip for extended use.
- Castleated engagement for secure tightening: Precisely matches the UM castle nut to deliver reliable torque transfer and reduce cam-out during assembly.
- Ergonomic, high-visibility handles: Bright red grips improve visibility in cluttered work areas and provide a comfortable, secure grip for precise adjustments.
- Specifically matched for ER16 with UM castle nut: Designed to fit ER16 collet chucks exactly, ensuring quick, confident installations without guesswork.
Used with ER16 collet chucks that employ the UM castle nut, this spanner makes tightening fast, accurate, and repeatable. The castleated geometry seats squarely, reducing wear on components and helping you achieve consistent clamping force. With straightforward operation and a purpose-built design, you can streamline setups, minimize downtime, and maintain reliable performance across repeated jobs.
| Collet Size | ER16 |
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.
Full Range: Omega Products Castleated Spanners/Wrenches - For ER Collet Chucks with Castle (UM) Nut
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