Description
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Free delivery on all orders over £100
The Union Monarch Replacement Door Lock Gearbox Case is designed as a reliable replacement for old, worn or failed Union Monarch locking mechanisms commonly fitted to uPVC and aluminium doors.
Ideal when the original gearbox has become difficult to operate, the handle is no longer engaging correctly or the internal mechanism has failed. Replacing the centre gearbox can often restore the operation of the existing multipoint locking system without needing to replace the complete lock strip.
Please carefully compare the measurements, fixing points, spindle position and lock markings with your existing gearbox before ordering, as several similar Union lock cases are available.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Delivery Information
We aim to dispatch your order as quickly as possible.
● Same Working Day Dispatch: Orders placed before 2:30 pm, Monday to Friday, are normally dispatched the same working day.
● Orders After 2:30 pm: Orders placed after the cut-off time, at weekends, or on Bank Holidays will be dispatched on the next working day.
● Delivery Services: We use Royal Mail and DPD courier service, depending on the size and weight of your order.
● Standard Delivery: Most UK orders arrive within 1–3 working days after dispatch, although delivery times may vary during busy periods.
● Next Working Day Delivery: Our Next Working Day Delivery service is available for Monday to Friday deliveries only. Orders placed before 2:30 pm on a working day will be dispatched the same day for delivery on the next working day. Orders placed after the cut-off time, on Fridays after 2:30 pm, at weekends, or on Bank Holidays will be delivered on the next working day. Weekend and Bank Holiday deliveries are not included.
● Carriage Paid Orders: All orders over £100 qualify for free delivery (carriage paid).
● Delivery Restrictions: We are unable to send items over 1 metre in length to Northern Ireland or the Highlands & Islands.
● Order Tracking: Tracking details will be provided where available.
● Click & Collect: Collection from our Denton store is available. Please wait until you receive confirmation that your order is ready before collecting.
If you have any questions about your delivery, please contact our customer service team and we’ll be happy to help.
Quick & Easy Returns
Easy Returns Policy
We want you to shop with confidence at Nigel Waters Hardware. If you need to return an item, we aim to make the process as simple and hassle-free as possible.
If you’re unsure whether you’ve selected the correct replacement part before ordering, our team is happy to help. Simply get in touch with photos or details of your existing part, and we’ll do our best to ensure you receive the correct product the first time.
If you have any questions about returns or exchanges, please contact our customer support team and we’ll be happy to assist.
Friendly Support
Need help finding the right part? We’re always happy to help. If you’re unsure which lock, handle, gearbox, hinge or replacement part you need, simply send us a photo and any measurements you have. Our experienced team will do their best to identify the correct product before you order, helping you save time and avoid unnecessary returns.
Secure Online Payments
Shop with confidence at Nigel Waters Hardware. We use trusted, secure payment gateways to protect your personal and payment information every step of the way. Whether you’re purchasing replacement door locks, window hardware, garage door parts, or security products, you can enjoy a fast, safe, and hassle-free checkout.
We accept a range of secure payment methods, giving you complete peace of mind with every order.