Are you looking for a product to help take up slack in your straight pull,
inline rigging assembly? The turnbuckle is what you will need. Watch our video
explaining the different styles of turnbuckles and how to use them in your
If you prefer a text and picture version of the information, read more.
Turnbuckles are used to take up slack and apply tension to a rigging
They are designed to be loaded in straight pull, inline applications. They
come in a variety of types, sizes, and coatings to suit many suspending, tie
down, and tensioning type applications.
Turnbuckles are categorized by thread diameter, take up length, and end
Thread diameter refers to the diameter of the threaded portion of the end
fittings. Larger thread diameters will have a greater load carrying capacity
than smaller thread diameters.
Take Up Length
Take up refers to the total length that the end fittings can screw in and out
of the turnbuckle body to take up tension.
To increase the amount of total take-up capability in your system, either
choose a turnbuckle with more take-up, or attach 2 or more turnbuckles
together, in line.
Turnbuckles can tension assemblies without twisting them up because one end
fitting is left hand threaded and the other is right hand threaded. This
design feature ensures only the turnbuckle body twists when tensioning.
Sizing Turnbuckles to Other Rigging Components
It is important to note that the working load limit should always be taken
into consideration when sizing and matching turnbuckles to other rigging
For example, a 1/4”x 4” turnbuckle has a much lower working load limit than ¼”
cable or ¼”
eyebolt, and the fittings may not connect
easily. Up-size the turnbuckle to a size that more closely matches or exceeds
the working load limit of the rest of the assembly or a working load limit
that meets your loading requirements.
E-Rigging offers typical turnbuckles with a selection of 3 different types of
end fittings with each fitting having its own purpose, advantages, and
Eye End Fittings
Eye end fittings are used with other components that can be opened and connect
into the eye such as a shackle or quick link. They contain no moving parts and
are the most cost-effective end fitting of the three.
Jaw End Fittings
Jaw end fittings are composed of a jaw, bolt, and nut. These are used to
connect to other components that cannot be opened, such as an eyebolt or
swaged sling eye.
Depending on size, some jaw turnbuckles only come with a pin and cotter.
You can find a list the of the components included with each jaw on our
Hook End Fittings
Hook end fittings are used for temporary connections and are easily attached
and detached from other rigging components.
We do not recommend hook fittings in situations where tension can
unexpectedly release from the turnbuckle as this may cause the hook to
Double check your fittings when using hook turnbuckles because the hooks are
large and may not fit with other fittings having a similar working load limit.
Toggle Jaw is a specialty end fitting which is available on some of our
stainless-steel turnbuckles. It is especially useful when the turnbuckle
must articulate in a direction that isn’t allowed by the other component
used in the application.
E-Rigging also carries a variety of Cable Railing Swage Turnbuckles which
are used in cable railing systems. Visit our
Cable Railing page and our
YouTube channel for more
information on these types.
Drop Forged vs Formed and Welded
Our galvanized turnbuckles are drop forged.
Our stainless turnbuckles come in both drop forged or formed and welded
The formed and welded turnbuckles are nearly as strong as the drop forged
turnbuckles, and offer significant cost savings. For critical applications
that require stainless turnbuckles, the drop forged turnbuckles will offer
better long-term reliability due to the end fittings’ elongated design that
reduces stress and their superior manufacturing process.
Our turnbuckles are made from hot dipped galvanized steel and type 316
stainless steel. For more information on coating types, please watch our
video on YouTube or check out our Blog.
Stainless Steel Turnbuckles
Our most corrosion resistant
Best suited for outdoor applications
Highly resistant to rust
Ideal for use in or near saltwater environments where corrosion frequently
The best choice when using other stainless steel components.
Hot Dipped Galvanized Turnbuckles
Lower cost than stainless steel
Suited for outdoor environments
They are not as corrosion resistant as stainless steel.
Unscrew End Fittings of the Turnbuckle
Unscrew the end fittings of the turnbuckle so that they are both fully
extended. This can easily be done by unscrewing each end fitting one at a
time until they are both equally extended.
Attaching Fittings for Jaw and Eye Turnbuckle
Unscrew the bolt from the jaw.
Insert the jaw over the eyebolt.
Then, insert the bolt back into the turnbuckle and fasten it tightly.
Insert the eye into the opened shackle.
Close the shackle so that the eye is locked into place.
To tighten the turnbuckle, you can either use your hand, a screw driver, or
a wrench to turn the body. Make sure to stop the end fittings from spinning
with the turnbuckle body. This will prevent the screws from screwing in
unequally. Tighten until your rigging assembly is tensioned to the desired
point needed for your application.
Locking and Application Considerations
If your application will expose the turnbuckle to vibration, it is good
practice to lock the end fittings from turning by using lock wire. This will
prevent unwanted loosening over time.
Your turnbuckle may also be equipped with lock jam nuts to prevent
These can be used in non-critical applications, but are not recommended for
critical applications as they put extra strain on the threads.
For pipe style turnbuckles, a small screw driver or other small diameter
type rod can be used to tighten the turnbuckle. Insert it into the hole in
the body of the turnbuckle and turn to the desired tension.
If you have any questions or need help choosing the products for your
next rigging assembly, contact us.
We look forward to helping you get your next project started.