A turnbuckle, stretching screw or bottle screw is a device for adjusting the tension or length of ropes, tie rods, and other tensioning systems, normally consisting of two threaded eyelets, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a right-hand thread. The tension can be adjusted by rotating the frame, which causes both eyelets to be screwed in or out simultaneously, without twisting the eyelets or attached cables. Turnbuckles are most commonly used in applications from structural elements in buildings to suspension bridges, which require a great deal of tension.
We stock and supply a wide variety of turn buckle design and size options that fit client specific rigging needs. Turnbuckles come with a variety of end fittings some of which are detailed below:
Deck Toggle - A “T” shaped bar sits inside a mounting bracket with holes on either side. This configuration allows the turnbuckle assemblies to rotate 180 degrees within the mounting bracket. This type of fitting is often used to attach to deck posts.
Drop Pin - These turnbuckle tie downs have a rotating pin on the end that flips flat into the body of the pin to thread through a hole and then can be extended perpendicular to the body for a secure hold. This end fitting offers an excellent clean look.
Eye - Solid loop end for wire rope turnbuckle with no vulnerable connection points to allow cable to slip through. Elongated eye version minimizes stress on the turnbuckle component.
Fork or Jaw - Rigging turnbuckles with wishbone shaped anchor point fitted with a nut and bolt or pin and cotter turnbuckle assembly, this type of fitting is ideal for situations where the anchor point is fixed and will not work with an eye or the anchor point needs to be secured from slipping off the fitting.
Hook - Stainless turnbuckle ending in an open hook. Hooked ends of the turnbuckle may open the same direction or in opposite directions depending on your rigging requirements. This fitting offers the quickest option for attachment and release.
Lag Screw - The threaded screw end of these turnbuckles allow for permanent, secure attachment to your anchor points.
Stub End - These rigging turnbuckles are used where a connecting point is not needed like most turnbuckle ends, but rather are used to separate or push apart objects.
Swage Stud - Swage stud turn buckle fittings offer a solid corrosion resistant end point that is threaded to accept wires directly into the fitting and swaged to secure them permanently.
Threaded Rod - Turnbuckle hardware end fitting with standard threads that easily form a direct connection to a post or other mounting surface.