Collecting GeekHack novelty keycaps: how to identify sets and check fit
Collectors of GeekHack-branded novelty keycaps (the forum's "GEEK HACK" legend on single keys, often an Esc or a spare cap) usually work from a reference list and tick items off. This page covers what those items are, how to identify them, and, just as importantly, how to make sure a cap you are offered will fit your keyboard.
In this guide
What the reference list contains
A long-running GeekHack thread catalogues these keycaps. Going by that thread, the collection is dominated by Cherry MX double-shot caps in around two dozen colour combinations of the "GEEK HACK" legend, such as black on orange, red on white and white on pink, made mainly by Signature Plastics in the WYSE font. The thread also lists pad-printed and dye-sublimated Cherry MX caps, some with other makers, laser-etched examples from a keyboard retailer, 1.25u modifier keys from fundraisers, aluminium caps, and a small set for Alps switches (orange on black, and white on kiwi green that came with a GeekHack Space Saver keyboard).1 Group buys by several well-known organisers are credited in the thread.
Two items from the list matter for the people hunting for them:
- RA 2.0 red on white. The thread singles this out as particularly elusive, and replies treat it as a remaining gap in collections.1
- Valentine white on pink and white on dark pink. The thread lists the two Valentine colourways as separate entries, with short codes beside them. Replies identify both as additions collectors wanted.1
Beyond what the thread records, there is no verifiable public detail on who made those specific caps, in what quantity, or in which year, so be wary of anyone who quotes exact run sizes without a source. The practical approach is to match photos against the thread's list and to ask for clear photos of the legend, the underside and the stem.
Interest checks and group buys
Most collectible keycaps start as an interest check: a forum post with renders and specifications to see whether enough people want the set. If interest is strong, an organiser launches a group buy, collecting payment to reach the manufacturer's minimum order quantity. Production can take six months or longer, and the usual risks are delays, changed specifications, poor organiser communication and the order failing if the minimum is not reached.2 GeekHack organises these in separate sections for interest checks, group buys and preorders, and classifieds.2
This history explains why old novelty caps are rare: they were made once, in a limited run, for a particular buy. It also gives you a research route. If you can identify the group buy thread for a set, the original post usually shows the colours, the manufacturer and the keys included, which is the best way to tell a genuine cap from a similar-looking one.
Double-shot, dye-sub, pad printing and laser etching
How the legend is made is one of the main identification clues:3
| Method | How it works | What to look for |
|---|---|---|
| Double-shot | The legend is moulded as a separate plastic shot and filled with the contrasting colour | Legend is flush and sharp; it cannot wear off in the same way |
| Dye sublimation | Ink is heat-fused into PBT plastic | Fine, multi-colour detail; the legend sits inside the plastic surface |
| Pad printing | Ink transferred by a silicone pad | Cheapest and most common; legend can wear |
| Laser etching | A laser marks the character | The thread lists laser-etched examples from a keyboard retailer |
Wikipedia describes double-shot as the most durable method. The thread's own division is also useful: it separates double-shot Cherry MX caps from pad-printed and dye-subbed ones, so a "novelty cap" claimed as double-shot in a listing but with a printed legend is a mismatch worth questioning.1 To check, look at the legend edge under magnification and from an angle; a double-shot legend is an inlay with a crisp boundary, a printed one has a slightly raised or hazy edge.
Material matters too. ABS is the common soft, slightly slick plastic; PBT is harder, sandier and resists yellowing.3 Yellowing on an old white ABS cap is normal ageing, not necessarily a fake, but it affects how a pair of caps match.
Profiles: Cherry, OEM, SA, DSA
Profile is the shape and height of the cap, and sculpted profiles change by row. The common ones are OEM, Cherry, SA and DSA.3 OEM is the most common profile on mainstream mechanical boards. Cherry profile is somewhat lower, with sharper bottoms.4 Signature Plastics' DCS profile is mostly compatible with Cherry's but not exactly, especially in bottom-row angles.4 The fit with a switch does not depend on profile, but the look and feel of a mixed row can. If you are replacing a single key in a row, use the same profile and row, and ideally the same plastic, or it will look and feel different.
Cherry MX or Alps: the stem decides
A cap fits a switch only if the stem matches:
- Cherry MX uses a cross-shaped stem that is only symmetrical when rotated 180 degrees, with the horizontal arms around 1.25 to 1.30 mm and the vertical arms around 1.05 to 1.10 mm.5 Many MX-compatible switches from other makers (Gateron, Kailh, Outemu and others) accept the same caps.6
- Alps uses a rectangular mount: the slider slot is about 4.6 by 2.3 mm and the cap has a rectangular peg of about 4.5 by 2.2 mm.7 Alps and MX caps are not interchangeable. Third-party makers including Signature Plastics, Fentek and Tai-Hao have produced Alps-compatible caps.7
Alps switches, such as the Alps SKCM Orange and SKBM Grey, are a collector interest in their own right.8 This is why the GeekHack list is divided by switch type. An Alps cap will not fit a Cherry MX switch, and a cap that looks identical in photos may be the other type, so ask the seller to photograph the underside.
How to check a cap against your keyboard
Before paying, verify these in order:
- Stem type. Pull a keycap from your board and look at the switch. A cross means MX-style; a rectangle means Alps.6
- Key size and position. Check the cap's unit width (1u, 1.25u, 1.5u and so on) against the position it is meant for, including the stabiliser fitting on wider keys. Non-standard bottom rows or unusual modifier widths often need extra keys.6
- Layout. ANSI and ISO differ in Enter and Shift shapes.6
- Profile and row. Match the profile of the rest of your set, as above.
- Condition. For double-shot caps, check for shine from wear on the legend and for cracks around the stem.
- Provenance. Look for the group buy thread or the original seller's listing, and be cautious if the seller cannot connect the cap to a named buy.
When buying through classifieds, use a payment method with buyer protection, as GeekHack-oriented guides recommend for group buys.2 This page makes no statement about current availability or value; check live listings and sold threads.
Searching for an exact colourway rather than a lookalike
A useful wanted post describes a cap in four parts: legend, colour combination, switch mount and profile. For example, “GeekHack RA 2.0 red-on-white novelty, MX mount, underside photo required” is much more precise than “rare GeekHack keycap”. Try both GeekHack and Geek Hack; listings may use the forum name as one word while describing the printed legend as two.
For Valentine caps, keep white-on-pink and white-on-dark-pink as separate searches. A seller's “pink” may cover either, and lighting can hide the difference. Ask for a daylight photograph beside another cap of a known colour. The useful comparison is between physical caps, rather than two screenshots taken under different lamps.
| Your aim | Details to prioritise |
|---|---|
| Complete a collector reference list | Exact colourway, printing method and connection to the original buy |
| Fit a working keyboard | Mount, unit width, profile and row |
| Replace a lost matching key | Colour next to the existing set, legend size and surface wear |
Does a loose cap need its original bag?
Original packaging can connect it to a group buy, but an unlabelled bag adds little evidence. Ask for the sale thread or organiser information if provenance affects what you will pay.
Is shine the same as a damaged legend?
No. Surface wear and the legend's condition are separate observations. Request an angled photo for shine and a straight-on close-up for the lettering, then check the stem for damage before treating it as a usable replacement.
Sources and further reading
- GeekHack Key Caps thread, GeekHack: collector-compiled reference list of GeekHack novelty keycaps.
- Navigating GeekHack for new users, KeebsForAll: retailer blog; interest checks, group buys and their risks.
- Keycap, Wikipedia: printing methods, materials and profiles.
- Keycap profile, Deskthority wiki: OEM, Cherry and DCS profiles.
- Cherry MX, Deskthority wiki: stem dimensions and symmetry.
- How to check keycap compatibility for your keyboard, Krome Keycaps: vendor guide; stem, layout and bottom-row checks.
- Alps keycap mount, Deskthority wiki: Alps mount dimensions and third-party Alps caps.
- Alps Alpine, Wikipedia: company background and collectible switch types.