Rigging Screws

Rigging screws and turnbuckles, also known as straining screws or bottlescrews, are a simple piece of equipment used to adjust the tension of wires and ropes or to secure loads.

Rigging screw and turnbuckle are interchangeable terms, commonly the term rigging screw refers to a fitting with an enclosed body hiding the threaded section, whereas a turnbuckle will have an open body, exposing the threaded section. Both fittings can be used under the same application but turnbuckles are generally smaller and have a greater ability to be tightened under load.

How do Rigging Screws work?

To use a rigging screw and turnbuckles you attach the wires or ropes than need to be tensioned to the fittings at either end. Rotating the body of the rigging screw pulls the ends towards one another, causing the rope to tighten, or away from each other, causing it to loosen. This piece of equipment can have different ends depending on your needs – hooks, eyes or jaws, or a combination of two of these. Jaws usually have pins to keep them securely in place and eyes are available in a range of diameters. Closed body fork (or jaw end) rigging screws can be directly attached to an eyebolt without the need for extra shackles or fasteners. Rigging screws can also be swaged (crimped) to wire rope.

What are Rigging Screws used for?

Rigging screws are used in applications where a rope needs to be held at a certain tension. They can also vary in thread size, depending on the size of the rope. You'll have seen them in action on the ropes around a boxing ring, the cables of a suspension bridge or in the rigging of a boat.

Material and Sizes

Available in steel and stainless steel with a galvanised or polished finish and a range of open and closed lengths.


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Description Price Material Finish End Fittings Thread Size Working Load Limit Weight Eye Diameter Closed Length End A Fitting End B Fitting Open Length
RS Stock No. 674-005
BrandRS PRO
€3.71
Each
units
Steel Electro Galvanised Hook to Eye M6 2t 59g 9mm 172mm Hook Eye 258mm
RS Stock No. 183-5958
BrandRS PRO
€53.48
Each
units
Stainless Steel Electro Polished Jaw to Jaw M8 - 160g 8mm 165mm Jaw Jaw 240mm
RS Stock No. 183-5942
BrandRS PRO
€32.63
Each
units
Stainless Steel Electro Polished Jaw to Jaw M5 - 900g 5mm 130mm Jaw Jaw 190mm
RS Stock No. 312-3487
BrandRS PRO
€33.93
Each
units
Steel Galvanised Jaw to Jaw M10 7.5cwt 470g 8mm 235mm Jaw Jaw 349mm
RS Stock No. 312-3493
BrandRS PRO
€39.66
Each
units
Steel Galvanised Jaw to Jaw BSW 5/8 15cwt 1.4kg 12mm 381mm Jaw Jaw 550mm
RS Stock No. 674-027
BrandRS PRO
€4.02
Each
units
Steel Electro Galvanised Hook to Eye M10 7.5t 208g 14mm 222mm Hook Eye 311mm
RS Stock No. 674-011
BrandRS PRO
€3.49
Each
units
Steel Electro Galvanised Hook to Eye M8 3t 126g 10mm 184mm Hook Eye 264mm
RS Stock No. 312-3500
BrandRS PRO
€49.05
Each
units
Steel Galvanised Jaw to Jaw BSW 3/4 22cwt 2.3kg 16mm 387mm Jaw Jaw 550mm
RS Stock No. 124-4846
BrandRS PRO
€56.27
Each
units
- Galvanised - 12mm 0.7t 530g - 323mm - - 478mm
RS Stock No. 124-4847
BrandRS PRO
€113.83
Each
units
- Galvanised - 16mm 1.2t 830g - 384mm - - 569mm
RS Stock No. 124-4845
BrandRS PRO
€56.27
Each
units
- Galvanised Jaw to Jaw 12mm 0.7t 850g - 320mm - - 479mm
RS Stock No. 312-3601
BrandRS PRO
€104.38
Each
units
Stainless Steel Electro Polished Jaw to Jaw M12 - 620g 12mm 245mm Jaw Jaw 360mm
RS Stock No. 312-3594
BrandRS PRO
€78.29
Each
units
Stainless Steel Electro Polished Jaw to Jaw M10 - 360g 9.5mm 190mm Jaw Jaw 270mm
RS Stock No. 674-033
BrandRS PRO
€5.29
Each
units
Steel Electro Galvanised Hook to Eye M12 10t 454g 16mm 241mm Hook Eye 324mm