What Is a Turn Buckle?


Turnbuckles are handy rigging devices that allow users to adjust the slack within their rig assembly gradually. Commonly found in pipe systems, turn buckles come in multiple configurations for maximum versatility.

Cleveland City Forge stocks multiple sizes and types of turnbuckles in both plain finish and hot-dip galvanized, each equipped with its end fittings that screw into the body of each turnbuckle.


Turnbuckles can be found in various industries and applications, from the tensioning of fences and perimeter cables to suspension bridge construction. Turnbuckles also find application in sports such as boxing rings and wrestling rings; their purpose is to stretch material tightly between two points using cable, wire, or chain tension that can be adjusted by turning its frame.

Turnbuckles come in different forms and sizes, but most feature three key components: body, jam nut, and end fittings. The body of a turnbuckle is an adjustable metal frame that can be rotated to extend or retract end pieces on either side – creating the tension needed in your line. Turnbuckle bodies come in many materials, such as carbon steel galvanized for protection against rust and corrosion – but stainless steel may be an option in environments prone to abrasive particles or chlorides.

Jam nuts are threaded bolts with adjustable threaded nut covers that can be tightened or loosened to alter the position of end fittings on a turnbuckle body. End fittings consist of threaded studs or hooks attached to either end of the body that can then connect to various types of hardware such as clevises, jaws, or shackles.

When choosing a turnbuckle, it’s essential to consider its load capacity as well as other elements, like its end fittings and overall length of line. Cozihom’s 304 Stainless Steel turnbuckle kit is heavy-duty and long-lasting – perfect for projects like mounting sun shades or cables on outdoor installations with its eye end fittings that make installation simpler with cable clamps.

Turnbuckle end fitting options allow riggers to customize their setup, for instance, by pairing a stub and eye combination with a clevis for quick connections between wire rope and other hardware or by choosing an elongated eye that provides more stability and lessens stress on the turnbuckle component.


Turnbuckles (also referred to as bottlescrews) are used across industries to gradually extend or shorten wire rope, cable lines, and tie rods without becoming damaged by corrosion or breakdown. Their galvanized or stainless steel composition enables this piece of rigging hardware to carry out this task effectively without being destroyed in the process.

Turnbuckles consist of a rectangular metal frame with threaded holes on either end, fitted with threaded fittings that connect via screws that screw into threaded holes on either end. End fittings connect via threaded holes at their respective ends and can then be used to adjust the tension of line assemblies. One end often has left-hand internal threading, while its opposite can have right-hand internal threading; these ends may then be connected via clevis ears, eye bolts, or hooks for connection.

When connected and turned clockwise, end fittings will move toward each other to tighten the line assembly; when connected and turned anti-clockwise, they will pull apart to loosen it.

Turnbuckles are highly adaptable tools, finding applications in diverse industries such as architecture, rigging, marine, and aerospace applications. Their easy operation explains their widespread popularity.

Rigging hardware pieces from these manufacturers are constructed to withstand harsh industrial environments, making them cost-effective choices for projects requiring long-term use and maintenance.

Turnbuckles are essential tools in the construction industry, used extensively during the framework-building process for buildings and homes alike. Not only are they used for framework building, but they can also be used to connect wood, metal, and cables during this crucial part of construction – making turnbuckles especially helpful when creating open spaces that need high amounts of structural stability.

Industrial hardware suppliers offering top-quality turnbuckles should provide various styles, designs, and sizes to fit every application. Turnbuckles provide tension for larger systems, so they must be chosen accordingly when purchasing turnbuckles for business use. When looking for turnbuckle suppliers, look for reliable suppliers with high-quality hardware at quick delivery rates – something top-quality suppliers offer reliably.

End Fittings

Turnbuckles are hardware devices used to reduce tension in wire rope and cable systems by tightening and untightening wire rope/cable end fittings on either side. When pressure needs adjusting, end fittings screw into the turnbuckle body extending or retracting with each revolution of its body to apply or release tension as required. With various materials, styles, end fittings, and materials combinations available today that allow turnbuckles to attach to open/closed/temporary/permanent connection points seamlessly, as well as Working Load Limit requirements when used correctly as all rigging hardware does – turnbuckles must adhere to this.

Clevis rod ends are two end fittings that connect to opposite ends of the body via screws, known as clevis rod ends, and come in various sizes and shapes to meet your linkage needs. Joint clevis rod ends include thimbles, eye bolts, jaw bolts, and stainless steel options that offer more excellent corrosion resistance than their galvanized counterparts.

Threaded portions on each clevis end allow you to screw a hex key or wrench onto them for turning and tension adjustment in linkages systems. As with most devices, more significant threaded portions allow more torque to be applied; maximum take-up length measures this full torque-applying capability; it is recommended to choose devices with larger thread diameters for optimal use in your application.

Turnbuckles utilize an adjustable body to connect end fittings and turn to adjust tension within an assembly rig. A closed-body design features an internal pipe casing that encases its threaded portion for a sleek and compact profile, while an open-body one has visible threads through its frame.

Eye and jaw turnbuckles feature eye end fittings on both ends that are designed for attaching shackles or quick links, providing a quick way to create temporary connections quickly with no risk of unexpected tension release. When used without safety latching mechanisms, they should only ever be used temporarily until their purpose has been accomplished.


Turnbuckles are used to adjust tension across many rigging assemblies. From simple installations such as fences and boxing rings to larger projects like aircraft or suspension bridges, turnbuckles provide tension adjustments essential for decreasing cable slack and wire tension slack. Their versatile end-fitting options make turnbuckles popular choices among industrial applications.

Industrial hardware suppliers carry various types of turnbuckles. When selecting one, it’s essential to understand its basic design and components. Typically, the center handle of a turnbuckle consists of a rectangular metal frame that turns so that end fittings on either side can extend and retract freely – these end pieces may include threaded rod ends or D shackles that connect to mating rigging components for proper functioning.

An essential consideration when selecting a turnbuckle is its capacity to meet the weight and temperature limitations of its application. If it is exposed to moisture, direct sunlight, or other environmental elements, it should be constructed from stainless steel for extra durability; its composition also determines resistance against corrosion or other forms of damage.

Installation of a turnbuckle may appear daunting to novice users, but it is actually fairly straightforward. First, unscrew all end fittings until they reach full take-up length before connecting to fastening points. Next, rotate the body of the turnbuckle so as to bring end fittings closer together in the middle, creating tension or adding additional strength as necessary.

Some turnbuckles come equipped with lock nuts at each end for additional security, though these do not always provide reliable locking conditions and should be regularly inspected to ensure they’re safe to use. It is also essential that end fittings remain securely attached to the turnbuckle body; any rotation during tightening could cause cables or wires connected to it to twist, potentially weakening or even damaging applications – one reason it is recommended to use wrenches when tightening eye bolts or D shackles pins.