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Stainless steel set screws have excellent corrosion resistance in most environments.
These nylon set screws are chemical resistant, lightweight, and nonconductive. The tip makes good contact on flat surfaces and allows you to make frequent adjustments with minimal surface damage.
The flat tip of these set screws holds tightly on flat surfaces without damaging them, even when making frequent adjustments.
A nylon locking patch grips threads to resist loosening.