When people compare M8S 12 pin, 36 pin, and 42 pin cartridges, the real question is usually not which number is universally best. It is which M8S-compatible tip matches the session style, the area being worked on, and the reorder habit without creating a fit problem. Start with the M8S cartridge guide if you are still confirming the device family, then use the pin count as the second decision.
Quick comparison
| M8S option | Practical role | Best check before opening |
|---|---|---|
| M8S 12 pin cartridges | A lower pin-count option when you want a more focused standard tip choice. | Confirm the product title says M8S and 12 pin. |
| M8S 36 pin cartridges | A common higher-density option for users who already know they want 36 pin. | Compare the connector and pack label with your original M8S cartridge. |
| M8S 42 pin cartridges | A higher-density option for users specifically shopping 42 pin M8S packs. | Do not assume 42 pin from another model family will fit. |
What the pin count actually decides
Pin count is a tip layout choice. It does not decide whether the cartridge can lock into the pen. Model family and connector shape decide that. This is why a good ordering flow starts with the M8S cartridge collection, then narrows into 12 pin, 36 pin, or 42 pin after the model is settled. The number is useful only after the cartridge family is correct.
If you want a broader explanation of how pin count and nano tips fit into the larger catalog, keep the pin count and nano selection guide open while comparing products. It helps prevent the classic mistake of buying by number first and model second.
If you already know your favorite pin count
Repeat buyers should still slow down for one minute before opening the pack. Compare the new cartridge with the last M8S cartridge that locked correctly, especially around the base. Product photos can be small, and the visible tip end can distract from the connector. If the label says M8S and the base matches, then the pin-count choice becomes simple. If either detail is off, keep the remaining packs sealed and document the mismatch before you decide whether to reorder.
For users stocking more than one tip style, label storage bags or bins by model first and pin count second. A simple label like “M8S – 12 pin” or “M8S – 36 pin” prevents loose packs from becoming a guessing game later. This is especially helpful when several sealed packs have similar white blister packaging.
How to choose between 12, 36, and 42
- Choose 12 pin when the product page clearly says M8S and you want that specific lower-count tip.
- Choose 36 pin when you already use 36 pin M8S cartridges and want a straightforward reorder.
- Choose 42 pin when the pack, title, and connector photos all confirm M8S fit.
- Avoid mixed-model listings that rely on vague wording instead of a clear M8S label.
- Keep a photo of your current cartridge base so you can compare shape before opening a new pack.
Fit check before first use
A cartridge should align, twist or seat smoothly according to your pen design, and lock without heavy pressure. If it stops short, sits crooked, or feels like it needs force, use the cartridge fit troubleshooting guide before continuing. Forcing the cartridge can damage the pack, the connector, or the pen head.
Use only sterile, compatible cartridges. Keep sealed packs closed until you have confirmed model fit, and do not reuse or share cartridges. If the pack is damaged, the connector looks wrong, or the cartridge does not seat smoothly, stop and verify before use.
Bottom line
For M8S, 12 pin, 36 pin, and 42 pin are all shopping choices inside the same model-first workflow. Pick the pin count you intended, but only after the product page, packaging, and connector all point to M8S.
