Kegerator Tap Handle Threads: 3/8 inch vs 5/16 inch

What the thread size means on a tap handle listing

A tap handle is the knob on the faucet that opens and closes the flow from a kegerator tower. The handle mounts on a threaded post, and the size of that threaded connection is the tap handle thread.

Two thread sizes appear most often on tap handle listings: 3/8 inch and 5/16 inch. The number names the diameter of the threaded connection. A 3/8 inch handle is built for a faucet post of that size, and a 5/16 inch handle matches the smaller post.

The thread size is a compatibility detail, not a style detail. It does not tell you how tall the handle is, what material it is made from, or how it looks on your tower. Those are separate details that the bullet list and the image set should state.

When you compare tap handle listings, the thread size is the first piece of information to read because it decides whether a handle can physically attach to your faucet. Other choices, like tap handle style or wood versus metal, come after the size is confirmed.

• 3/8 inch is the larger of the two common sizes.
• 5/16 inch is the smaller of the two common sizes.
• The size is a compatibility detail, not a style detail.

How to read the thread size in a listing

On a tap handle listing, the thread size usually appears in the title or in the first lines of the bullet list. A title can read "tap handle, 3/8 inch", and a bullet can read "fits 5/16 inch faucet posts".

The size does not tell you the height of the handle, the material, or how it looks on your tower. Those are separate details that the bullet list and the image set should state.

If the thread size appears only in the bullet list, read the full list before deciding. A title can name a size, but the complete picture comes from comparing the stated details across the listing.

Some listings pair the thread size with the faucet type. For example, a listing might say "for standard faucets" along with the size. That phrase is useful, but it does not replace the size number. The size number is the factual detail that lets you match a handle to your own faucet post.

When you see a thread size in a title, verify that the bullet list and the image set do not contradict it. The title is a summary; the full listing is the source of the stated details.

• Look for the thread size in the title and the bullet list.
• Check the image set for any size labels or adapter mentions.
• Treat the title as a summary, not the final word.

Matching the handle to your faucet

The faucet on a kegerator tower has a threaded post where the handle screws on. A handle with a 3/8 inch thread is made for a faucet with a 3/8 inch post, and a handle with a 5/16 inch thread matches a 5/16 inch post.

To know which size you need, check the faucet or tower listing for its thread size, or look at the handle you are replacing. If the existing handle is 3/8 inch, a new 3/8 inch handle is the direct match.

Some tap handle listings include an adapter that lets one handle work with both sizes. When a listing mentions an adapter, read which sizes it covers before you rely on it. An adapter is a small part that changes the thread size of the post or the handle.

The thread size also connects to the tap shank length, which is the length of the metal tube that goes through the tower wall. A longer shank may need a different handle height, but the thread size remains the same. Confirm both details on the listing before you buy a handle as a replacement.

If you are outfitting a new tower, read the tower listing for the faucet thread size. Many towers with multiple taps use one size across all faucets, but the listing is the only place to confirm that. A dual tap versus triple tap tower can have the same thread size for each faucet, but you need to see the stated details to be sure.

• Check the faucet or tower listing for its thread size.
• Look at the handle you are replacing for its size.
• Prefer a handle that states its size in the title or bullets.

Adapters and cross-size compatibility

The two common thread sizes are not interchangeable without an adapter. A 3/8 inch handle does not fit a 5/16 inch post directly, and the reverse is also true.

Some tap handle listings include a brass or stainless adapter that mounts between the handle and the faucet post. When you see the word "adapter" in a listing, read which sizes it covers. An adapter usually converts one thread size to the other, but it may cover only one direction.

Adapters are helpful when you have a handle you like and a faucet that does not match. However, an adapter adds a point of connection. If a listing does not mention an adapter, assume the handle fits only its stated thread size.

Cross-size compatibility is not the same as the faucet material choice. Brass and chrome refer to the finish of the faucet, not the thread size. You can find both materials in both thread sizes, so always confirm the thread size separately.

When you compare listings, group them by thread size first, then look at style and material. This keeps the compatibility question separate from the cosmetic question.

• 3/8 inch and 5/16 inch are not directly interchangeable.
• An adapter can change the thread size, but only if the listing states it.
• Read the adapter size coverage before relying on it.

When the listing does not state the thread size

A listing can omit the thread size. That omission is a detail the seller has not stated, and it means the fit is not confirmed by the listing.

For a new kegerator that comes with its own handle, an unstated thread matters less. For a direct swap, you want a stated size. Treat an unstated thread as a question to ask the seller, or choose a handle that names its thread size.

The same logic applies to towers with several faucets. A single tap versus dual tap question is separate from the thread fit, but both belong on your checklist before you compare listings. Handle style and tap shank length are additional details you can read on the same listing.

If you are buying a full kegerator rather than a handle, the thread size of the included handle is often not the main decision. The number of taps, cabinet width, and undercounter versus freestanding shape are bigger factors. The thread size becomes important when you plan to customize the tower later.

Choosing a thread size for your setup

The choice starts with the faucet you already have or the kegerator you plan to buy. A new kegerator with a tower comes with its own handle, so the thread size matters when you replace or add handles.

For a dual or triple tap tower, check whether all faucets use the same thread size. Many towers use one size across the faucets, but the listing is the only place to confirm that.

Match the thread to the faucet first, then look at style and material. Wood versus metal handles is a separate decision from size. The guides below sort kegerators by stated details, so you can find a tower that fits your plan before you shop for handles.

For a dedicated home bar, a single tap with a 3/8 inch handle is a straightforward setup. For a shared space with several beers, a dual tap kegerator may need two handles of the same size. The decision list is the same: read the faucet thread size on the tower, then pick handles that match.

When you compare kegerators as a whole, use the guides to narrow by width, taps, and cabinet type. The best single tap kegerators guide is a good place to start, and the best undercounter kegerators guide helps if you are building into a cabinet. Thread size remains a handle-level detail that you can confirm after you pick the tower.

What to pick for your situation

Questions

What is a tap handle thread?

It is the threaded connection where the tap handle mounts on the faucet post. Listings name the size in inches, often 3/8 inch or 5/16 inch.

Is a 3/8 inch thread larger than 5/16 inch?

Yes. 3/8 inch is the larger of the two common sizes, and 5/16 inch is the smaller.

Will a 3/8 inch handle fit a 5/16 inch faucet?

Only if the listing includes an adapter for that pair of sizes. Without an adapter, the handle is made for the faucet post of its own size.

What if the listing does not state the thread size?

Treat the fit as unconfirmed. Ask the seller for the thread size, or choose a handle that states it in the title or bullet list.

Can I use the same handle on different kegerators?

Yes, if both faucets use the same thread size. Check each faucet or tower listing to confirm the size before you reuse a handle.

Does the thread size relate to the faucet material?

No. Brass and chrome describe the finish of the faucet, not the thread size. You can find both materials in both thread sizes, so always confirm the thread size separately.