
Fn replacement key QWERTY (PT) Black for Logitech MX Keys
FnReplacement key for keyboard Logitech MX Keys
Hinge includedThe white plastic clip that holds the key: shipped with it, ready to snap on.Colour: Black
This key is out of stock
Fn — QWERTY (PT)
Available now
We have this key for these layouts
Same part, taken from a keyboard of another layout or from another compatible keyboard: the printed legend, or even the colour, may differ slightly.
The Fn key is out of stock in QWERTY (PT) on the site. Our keys are usually available to order within 7 to 15 days, and sometimes already in stock. Leave us your email or chat with us: we will check our stock and get back to you.
Only need the white plastic hinge?
Is your key fine and only the hinge broken? Click the button and leave your email: we'll get back to you if we have the hinge in stock.
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Ask a questionVery easy to replace
2 minutes, no need to take the keyboard apart. No skills required.
- Lift the old key by one corner, straight up, with a fingernail or a spudger.
- Clip the supplied hinge onto its hooks.
- Set the new key on top and press the centre until it clicks.
Worried about getting it wrong? We'll send you a video.
Tell us which key you are replacing and we'll send you a video showing, step by step, how to remove it and fit the new one. Free, before or after you order.
Ask for the videoSee how it's done
Video “Logitech MX Keys how to remove keys” by Tin, published on YouTube under the standard YouTube licence: all rights reserved by its author. Keyspares is neither its author nor affiliated with Tin. The player only loads when you click; YouTube may then set cookies (Google privacy policy).
Recommended tools for some keys
Optional but handy: the spudger lifts the key without scratching or bending the mechanism, and the thin blade of the flat screwdriver unhooks the plastic hinge and helps clip it back in.
Specifications
- Category
- Modifiers
- Keyboard layout
- QWERTY (PT)
- Compatibility
- MX Keys (PC)
- Color
- Black
- Size
- 1U (standard)
Compatible with these Logitech keyboards
- Logitech Signature Slim K950
- Logitech MK950 Signature Slim
- Logitech Signature Slim MK955
- Logitech Signature Slim Solar+ K980
- Logitech ERGO K860
On these keyboards, this genuine MX Keys key takes the place of the official one: same scissor mechanism and mounting, with a legend and finish that may differ slightly.
Where is the Fn key and what does it do?
On a full-size Logitech MX Keys, the Fn key sits on the bottom row, between Alt Gr and the right Ctrl key, below the right Shift key. It types no character: held down, it switches the top row from its drawn functions (brightness, media, volume) to F1-F12. Fn + Esc swaps that setting for good.
About the Fn replacement key
Is your Fn key leaning, catching or off altogether? This Fn key for the Logitech MX Keys comes on its own, hinge included, and refits without tools. A genuine salvaged part: the Fn key is taken, pre-owned, from a dismantled keyboard and shipped without a dome.
Compatibility
This Fn keycap fits the full-size MX Keys (MX Keys, MX Keys S and MX Keys for Mac) in the QWERTY (PT) layout. On the MX Keys Mini, Fn and both Opt keys are a single unit wide, against 1.25 to 2 units here.
The Fn key: position, size and wear
The Fn key is wider than a letter key. It is held to reach the top-row functions, often with the hand stretched, and so at an angle. On a cap this wide, an off-centre press loads only one side of the scissor hinge: that side is the one that splits, and the Fn key then leans towards it or catches.
How to install it
Fitting the Fn key takes no tools. Unclip the old cap from a corner, clear away the broken hinge, clip the new one in the same orientation, then press the middle and both ends in turn — a key this wide leans if one side is not engaged.
Fn key — questions
- Where is the Fn key and what does it do?
- On a full-size Logitech MX Keys, the Fn key sits on the bottom row, between Alt Gr and the right Ctrl key, below the right Shift key. It types no character: held down, it switches the top row from its drawn functions (brightness, media, volume) to F1-F12. Fn + Esc swaps that setting for good.
- Will the Fn key fit my MX Keys?
- Yes, if it is a full-size MX Keys (MX Keys, MX Keys S and MX Keys for Mac) in the QWERTY (PT) layout: the Fn key has exactly this shape there. Not on the MX Keys Mini, where Fn and both Opt keys are a single unit wide.
- Is the hinge included with the Fn key?
- Yes: cap and hinge arrive together. The dome, the small rubber cup that makes the Fn key spring back, is not part of the order; the one on your keyboard is reused, and a spare dome can be ordered on its own.
- My Fn key feels loose or uneven after fitting — what should I check?
- Take the Fn cap off again and check that the hinge is clipped onto all its anchor points; if a metal wire sits under the key, make sure it is engaged in its clips. Then press the centre of the Fn key before its ends.
Check your keyboard's brand
You are looking at a Logitech key. Keycap and hinge differ between brands: this key will not fit an Apple keyboard.
Apple keys in the catalogue










