What Size Nails Do Framing Nailers Use?

The short version: length, diameter and collation

Three things define a framing nail for your tool. Length is how far the nail reaches, diameter (or gauge) is how thick the shank is, and collation is how the nails are joined into a strip or coil. A nail has to fit your nailer on all three counts.

Among the models on our spec sheet, the length range is very consistent. Several list 2 inches up to 3.5 inches, and a few stop a bit short or start a bit lower. The next section shows the spread.

Nail lengths in real framing nailers

Published specs show that most pneumatic framing nailers cover a similar window. The table below uses listings from our comparison data, so you can see how much the ranges overlap.

The takeaway is that a 3 inch nail fits every nailer in this table. Lengths at the extremes, such as 1.75 inches or 3.5 inches, need a closer look at the listing.

How penny sizes map to inches

Many lumber yards and plans still describe nails by "penny" size, written with a d, such as 16d. The number is an old naming system, not a direct measurement, but the common sizes line up with lengths in a predictable way.

These are general conventions, and the shank diameter can vary by nail type. Check the box for the exact figures.

• 8d is about 2.5 inches long, often used for lighter sheathing work.
• 10d is about 3 inches long.
• 12d is about 3.25 inches long.
• 16d is about 3.5 inches long for a common nail, and sinker versions are a little shorter.
• For a typical 2x4 wall, 16d is the usual choice, and it sits at the top of what most of the nailers above can handle.

Diameter matters as much as length

Diameter decides how well a nail holds and how likely it is to split wood. Thicker shanks grip better but need a nailer built for them. Our data shows the NuMax SFR2190WN accepts full round head nails from 0.113 to 0.131 inch in diameter, and the VEVOR RHF9021NS lists 0.113 to 0.130 inch for smooth shank nails.

Shank style can change the length limit too. The VEVOR listing gives smooth shank nails from 2 to 3.5 inches, but ring shank and threaded nails only from 2 to 3 inches. Ring and threaded shanks hold tighter in the wood, so they are a good fit when you want extra pull-out resistance. Just confirm the length limit for the shank type you buy.

Head style also counts. Some nailers take full round head nails, while the 30 degree paper model on our sheet lists clipped and offset round head nails. Using the wrong head style can jam the tool or leave the nails out of code, so read the listing.

Collation and magazine angle decide what you can buy

Even if a nail has the right length and diameter, it still has to be collated the way your nailer expects. Plastic strips, paper strips and wire coils are not interchangeable, and each pairs with a specific magazine angle.

In the listings we compare, 21 degree goes with plastic, 30 degree goes with paper, and 15 degree goes with wire coil. The 3PLUS HFN90SP has a quick change magazine that takes 21, 28 and 34 degree collated nails, which gives more choice at the store. Our best framing nailer page explains why collation is one of the first specs to check, because it controls which nails you can find nearby.

Check what your local store stocks before you buy a tool. A nailer you love is hard to use if its nails are always out of stock.

What about Milwaukee framing nailers?

Milwaukee makes framing nailers, but we have no Milwaukee model in the product data for this guide, so we cannot quote a specific range. The reliable way to find the answer is to look at the model number on your tool and read the nail specification in its manual or on the nailer's label.

The manual will list the collation, the angle, the length range and the diameter. Those four details are all you need to pick the right box. If you are still choosing a tool, our framing nailer comparison lists the same specs side by side, so you can match a tool to the nails you plan to use.

Safety notes before you load nails

Nailers are powerful, and a few habits prevent most injuries.

Wear safety glasses with side protection every time you fire the tool, and use hearing protection for long sessions. Keep your free hand and your body out of the line of fire, and never point a loaded nailer at anyone.

For pneumatic models, do not exceed the maximum air pressure on the tool. The Metabo HPT NR90AES1, for instance, lists 120 PSI as its maximum. Disconnect the air hose before clearing a jam or loading nails. On ladders or roofs, secure your footing first, since a recoil can throw you off balance.

Use only the nails the manufacturer approves. Off-spec nails can jam, misfire or damage the tool.

Frequently asked questions

Can I use shorter nails in a framing nailer?

Only if the nail length falls within the nailer's listed range. Most listings start at 2 inches, though one wire coil model in our data goes down to 1.75 inches. Shorter nails can fail to feed or drive properly.

Are 21 degree and 30 degree nails interchangeable?

No. The angle has to match the magazine, and the collation type usually matches too, with plastic at 21 degree and paper at 30 degree in our listings. A tool with an adjustable magazine, like the 3PLUS HFN90SP, takes 21, 28 and 34 degree strips.

Do cordless framing nailers use different nails?

They use the same kinds of collated framing nails, but each model has its own collation and angle. Check the listing or manual before you buy a box.

Why does my nailer leave nails sticking up?

Often the depth setting is too shallow, or air pressure is too low on a pneumatic tool. A tool-less depth adjuster lets you correct this quickly. Wrong nail size for the tool can also cause it.