Originally Posted by Finallybuyingaboat
Hmm, hadn't realized the stresses on the side stays were that high. Would probably strip the threads right out of an aluminum turnbuckle in a hurry. Stainless it is then....
I think you'll find the marine turnbuckles are actually made of bronze, or a bronze alloy, often chrome plated. They provide a good example of why boat stuff costs a lot, as they are subject to a lot more stress usually in a salty environment than the turnbuckles used around the house.