What is a Turnbuckle screw?
A Turnbuckle refers to the open body screws which have an exposed threaded section. Their fittings have the same uses as other Bottlescrews, but because they’re generally smaller and have a smaller adjustment, their capacity to be tightened under load is greater. They are often used in shade sails and marine applications.
What is a Bottlescrew?
This type of rigging screw has an enclosed body, so the threaded section is hidden from view. They are thought to have a sleeker design than the open body alternatives. The same fittings are used for both Bottlescrews and Turnbuckles. Commonly used in wire balustrade systems. Bottlescrews can also be swaged (or crimped) to wire rope.
What’s the difference between galvanised steel and stainless steel?
Galvanised steel refers to steel which has been coated in zinc to protect against corrosion. The process through which this occurs is called ‘continuous hot dip’ during which molten liquid zinc bonds to the iron in the steel, creating a protective layer. The newly galvanised sheet can then be spun into its final form. Galvanised steel does well in water, but not salt water.
Stainless steel is made by adding chromium to steel. It has high resistance to rust and water, including salt water, making it an ideal choice for marine applications. It is not resistant to chlorine however which will cause the coating to degrade.