Arrow threads are universal. The inside diameter of the inserts is 8/32. That is why all thread sizes are the same. There is no need to concern yourself with thread sizes when buying one.
Unless you use the Deep Six insert, all arrow threads are the same size. The only difference you need to note when buying parts of your bow is the outside diameter of the insert. You need to get the right size to fit in all different shaft sizes available on the market.
That is why most of the time, there are many different shaft sizes and inserts that you need to match to make sure you get the perfect shot. If the diameter of your insert is 5/16, that would perfectly fit for a 20XX aluminum or a .312 diameter carbon.
Misaligning your insert can happen in exceptional circumstances, depending on your bow. If your inserts and shafts do not match, there is a wobble when you shoot; therefore the high chance of missing your target. However, there are also cases where you must misalign your insert or broadhead to your shaft.
You will also see variations in and sizes in ferrule because of the significant popularity of carbon arrows these days. Most older broadheads, such as Thunderheads and Muzzy, have a 22/64 ferrule, the same size as a 2216 aluminum.
Moreover, many newer heads are in the 19/20 or 19/60 diameter range, and when used on a 2216 aluminum, the base will become slightly smaller and will not flush with the insert. In that case, there is a possibility of reduced penetration. However, all these head and shaft sizes perfectly fit the universal thread size.
What is the standard arrow thread size?
The industry-standard size of an arrow thread is 8/32—the 8/32 thread size is for all arrow inserts except the Easton Deep Six. The basis for the arrow thread size is the diameter of the inserts to make sure that they match well for an excellent shooting performance.
When buying from websites, the numbers and figures are the field point head diameter, not the insert diameter measurement. However, it is best to consider that the diameter of the arrow inserts is the diameter of the screw-in part of the arrow, which is universal. Please do not confuse it with the diameter of the field point.
Aside from knowing the standard arrow thread size, it is also best to know the outside diameter of your shaft. You should choose a diameter to best match your shaft because a smaller point size will have less wear on your targets if you select in-between sizes.
What is the difference between the Standard 8-32 thread and the Deep Six thread?
The standard and universal 8/32 arrow thread size perfectly fits the standard size shafts 5mm, 6mm, & 6.5mm with inserts using an 8-32 thread pattern. While Deep Six fits small diameter 4mm shafts with inserts that use the Deep Six thread pattern.
Deep Six is the broadhead thread standard and a mini-sized insert that started the production of a smaller broadhead-compatible and ultra-micro diameter arrow shaft. When Ultra-Micro Easton Arrows emerged in the market, it created a pivotal change in equipment designed and designated for serious bowhunting.
With more options for penetration, hunters consider Deep Six thread broadheads, arrows, and inserts worthy in the archery field. For hunters, Deep Six tipped arrows provide them more penetration by concentrating the arrow’s mass into smaller columns.
Those bowhunters who use Deep Six thread and inserts see improved blood trails, quicker game recovery, and complete pass-throughs.
Meanwhile, the standard 8/32 arrow thread perfectly fits the common steel field points designed to fit all carbon and aluminum arrows. It is the same thread used by all arrow inserts available in the market.
What is the standard arrow insert?
The standard arrow inserts 8-32 allow you to easily use and screw in various tips in the same arrow as the broadheads, blunt ends, field points, fishing tips, judo points, and arrow thread.
All arrows use the standard 8-32 thread (32 threads per inch, size #8), which follows the measurement of the inner diameter of the arrow insert.
However, as mentioned earlier, Deep Six products which are smaller in size, as they are micro diameter arrows, have different diameter measurements.
That means they also use different sizes for arrow inserts or tools to fit the arrow inserts in the shaft.
You can also get arrow inserts in various outer diameters or weights, but their standard size will always be 8-32. Ferrules are needed for most traditional carbon arrows with 340-500 spines and are 5/16 inches.
Moreover, for 600 and lighter spine inserts, you may need to decrease your point diameter to 19/64 or smaller. It is to make sure that you keep the insert from hanging up as you pull it from the target.
They always have taken more significant 11/32 inches field points for aluminum arrows. If you are unsure about the arrow inserts you need, never hesitate to ask the nearest archery shop near you.
How do I know what size of arrow inserts to use?
The size of your arrow insert should perfectly fit the edge of your shaft. You need to measure the inside diameter of your shaft. That will also have the exact measurement of the outside diameter of your arrow insert.
Arrow inserts differ in size based on their outside diameter measurement. Most of the time, these two come together when you purchase your arrow, but archers sometimes prefer a different shaft size. That is why you can find different shaft sizes in the market that goes along with an arrow insert.
If you look at your arrow, you can see a four-digit number. These numbers refer to the outside diameter and the wall thickness of the shaft. The first two digits are the estimated measurement of the outer diameter of the shaft. It is usually to the nearest 64ths of an inch.
Moreover, the second two digits are the wall thickness of the shaft in thousands of an inch. For example, if you have a 2514 shaft, the measurement would be approximately 25/26th of an inch in diameter, and its wall thickness is 0.14 of an inch.
In that case, they also have to look for an arrow insert that perfectly fits their shaft. If the arrow inserts and shafts do not match, you will notice a wobble when you shoot.
For example, if the diameter of your shaft is .312 carbon or 20XX aluminum, you need to get a 5/16 arrow to insert to perfectly fit your shaft and arrow insert. The unmatched sizes can cause less accuracy in your shots.
These days, there are more options available for arrow inserts than just the usual aluminum insert, which is a standard weight for most shafts. You get the opportunity to choose a brass insert from different models that allows you to boost up the front and center of your shaft.
Brass inserts also give you more options on how much weight you can put in your shaft for better accuracy and penetration. Most brass inserts are 4 or 6 mm in measurement with 50 or 75 grains total. You can also break off the back of a brass insert, so you can reduce it to 25 grains if you want.
Another type of insert available nowadays in the market is the hit insert and the deep six insert, a micro diameter design. These inserts help you improve your accuracy and give you the option to help perfectly align your blades with your vanes. However, it is advisable to match the size of your insert to the inside diameter of the shaft.
How to install arrow inserts?
To install arrow inserts ideally, you must ensure that the arrow ends are leveled and flat. Slide the insert inside the shaft until the broadhead stops, letting you know that the insert is fully seated.
There are two basic arrow inserts on the market these days, and they differ in how you can install them in the shaft. The basic types are carbon and aluminum arrows. Some inserts are already inside the shaft with no other visible material outside the shaft.
Meanwhile, other inserts must be glued to the shaft to keep it fully seated. Nearly all arrows come with the appropriate inserts you need for the shaft. If ever you get your arrow without the inserts, you can call back the shop where you bought the arrow and ask for the inserts.
You can also head to a local archery shop near you and get inserts that will adequately match the inside diameter of your shaft.
Here is a more detailed step on how you can install your arrow inserts:
- Cut your arrow to a length that you need them. You can opt to use an arrow squaring tool to ensure that the ends are flat and leveled.
The squaring tool helps you remove the excess material from the shaft to ensure that your cuts are even.
If you do not keep your insert leveled, it can sit at an angle, which means your point will not be in perfect alignment with your shaft. That can affect your accuracy.
- Place your arrow end at an angle where it forms a perfect 90-degree angle when the shaft sits on a table. Then you can put the insert at a 90-degree as well. If you use HIT or sunken inserts, put your filed point or the broadhead against the shaft at a 90-degree angle.
- After you thoroughly squared and cut your shafts, get a fast-setting glue and apply it to the bottom of the arrow inserts and the top of the shaft. Then, push the inserts into the shaft and immediately wipe off any excess glue.
The inserts should be set seconds after applying the glue, but it’s most advisable to wait a few minutes before you start shooting the arrow and installing the points.
- When installing HIT inserts, use the unique tool that comes with it. It usually has some epoxy and a tool that allows you to push the insert down into the shaft to reach the point of installation properly.
After you apply the epoxy and glued the HIT insert to the shaft, wipe the excess epoxy and let it sit for a few minutes.
Remember that when you use the epoxy on the inserts, you should also remove the installation tool and set the arrows on a flat surface. Extracting the installation tool will allow the epoxy or the glue to set while holding the arrow insert at the desired depth inside the shaft.
If you stand the arrow upside down before the glue sets in, the insert could slide out of the position, and you will have to repeat the process.