What is a 510 connection? The thread that connects nearly everything

The 510 name is widely traced back to an early Joyetech e-cigarette, the 510, whose connector became the de facto standard. The thread itself is a 7mm diameter screw with a 0.5mm pitch, so every 510 tank screws onto every 510 mod.

That standard is why the tank and mod market is so open. You can pair a Voopoo tank with a Geekvape mod or an Aspire tank with an Innokin battery, as long as both use 510 and the mod can drive the coil.

Pod kits are the main exception. Most use proprietary pods that only fit their own device, though some kits use 510 pod adapters.

A 510 connection has two electrical contacts. The centre pin carries the positive charge from the battery to one leg of the coil. The outer threaded body is the negative return. An insulator ring between them stops them touching.

On most modern mods, the centre pin on the mod is spring-loaded, so it pushes up to meet the tank pin whatever its height. That gives a reliable contact and lets tanks sit flush on top.

Some rebuildable atomisers have an adjustable pin, which you can screw in or out to suit older mods. Bottom feed versions have a hollow pin for squonk mods.

Not every vape uses 510. The comparison shows the main alternatives you might come across, and why 510 dominates the tank world.

The older eGo thread is a larger outer thread found on some early pen batteries. Many eGo batteries also have a 510 thread inside, so they accept both. Proprietary pod connections, held with magnets and contacts, are now the norm on pod kits because they are quick and simple.

Pod tanks bridge the gap. The Voopoo PnP X MTL and DTL pod tanks, for example, put PnP X coils onto a 510 base, so you can use pod-style coils on any 510 mod.

Liquid that leaks from a tank tends to run down to the 510 connection. Over time it builds up on the pin and threads, and that can cause a weak connection, a fluctuating resistance reading or a "no atomiser" message.

Cleaning is quick. Unscrew the tank, wipe the threads with a dry tissue, and clean the pin and insulator with a cotton bud. For sticky residue, a cotton bud lightly dampened with water works. Let everything dry fully before reconnecting.

Never use metal tools to dig around the pin. It is easy to damage the insulator or bend the spring. Tick off this list next time you clean.

The 510 connection is simple, but a few myths about it cause unnecessary worry. Tap each card to see what is true.

The most common worry is that a tank from one brand will not work on a mod from another. As long as both are 510, they will screw together and fire. What matters is whether the mod can deliver the power the coil needs, and whether the tank is wider than the mod looks good with.

The other myth is that tighter means better contact. Overtightening can damage the threads or the spring pin. Snug is enough. Browse our mods and tanks to mix and match.

The 510 standard is a big part of why tanks and mods are so flexible. If you are building your first tank and mod setup, check two things: that the mod can reach the wattage your coil needs, and that the tank diameter suits the mod.

Our guide to tank sizes and the 2ml rule covers tank widths, and the sub-ohm tank guide helps you pair power with coils.

And if your mod ever throws a connection error, the 510 pin is the first place to look, before you blame the coil or the mod itself. One question to check the key point.