100mm Key Cylinder – Long Euro Profile Double Lock Cylinder for Thick Doors, Keyed Alike

This 100mm key cylinder is a long euro profile double cylinder, operated by key on both sides. It is made for thick doors, doors with deep handles or escutcheons, and locks where a standard 60mm or 70mm cylinder is too short.

It is keyed alike (KA), so you can match several doors to one key.

Where can I use this 100mm key cylinder?

• Thick commercial and steel doors
• Doors with deep escutcheons or handle sets
• Aluminium shopfront doors
• Security and plant room doors
• Replacing a long euro cylinder

Why choose this 100mm key cylinder?

• 100mm long for thick doors
• Key operated both sides
• Keyed alike for one key across doors
• Supplied with keys and fixing screw
• Great value long cylinder

100mm key cylinder specifications

Choosing the right 100mm key cylinder

Measure from the centre of the fixing screw hole to each end of your old cylinder. The new cylinder should sit flush with the outside of the door furniture – no more than 3mm proud. Call us with your measurements if you need the exact split.

Fitting tips

Fitting a 100mm key cylinder is a straightforward job for most installers. Remove the old part, check the new one matches the cut-outs and fixing holes, then fit it with the screws supplied or your existing fixings. Test the lock several times with the door open before closing it, so you never lock yourself out. If anything feels stiff, check the door is hanging square and the keep lines up. For more guidance, see the Secured by Design website.

Need help choosing?

Not sure what you have? Many old locks and cylinders have no markings, so we regularly help customers match parts from a photo and a few measurements. Send us a clear picture of the faceplate, the side of the case or the cylinder, along with the backset and length, and our team will point you to the correct replacement before you spend a penny.

Care and maintenance

To keep your 100mm key cylinder working smoothly, clean away dust and grit from the lock and keep every 6 to 12 months, and use a dry PTFE or graphite lubricant rather than oil, which attracts dirt. If the key or latch starts to feel stiff, check the door alignment first – a dropped door puts strain on any lock.

Who uses this 100mm key cylinder?

Our 100mm key cylinder is popular with locksmiths, shopfitters, aluminium door installers, facilities teams and landlords who need dependable door hardware at trade-friendly prices. Trade customers can call 0121 714 0770 for prices on larger quantities.

Delivery and collection

Order your 100mm key cylinder by 1pm Monday to Friday and we send it the same day. UK delivery is free on every order, with next day delivery available for £8.50. You can also collect from our trade counters in Dartford, Kent and Wednesbury, West Midlands, open Monday to Saturday 8am–6pm. See our delivery information for full details.

Frequently asked questions

How long is this 100mm key cylinder?
100mm overall length.

What split is it?
Call us on 0121 714 0770 to confirm the split before ordering if your door needs an offset cylinder.

Is it keyed alike?
Yes, keyed alike cylinders share the same key.

Do you sell a 60mm cylinder?
Yes – see our 60mm key cylinder.

Why buy from All Fitting Hardware?

• In stock – order by 1pm Monday to Friday for same-day dispatch
• Next day delivery available
• Free UK delivery on every order
• VAT invoice with every order
• Easy 30-day returns on unused items
• Collect from our trade counters in Dartford and Wednesbury, Mon–Sat 8am–6pm
• Expert help on 0121 714 0770 or WhatsApp

Browse more euro cylinders, hook locks and 30mm euro cylinder hook lock.

Order your 100mm key cylinder today from All Fitting Hardware, the UK supplier of door, glass and roller shutter hardware.