These nuts have a nylon insert which grips the bolt thread to prevent loosening. Grade A4 stainless steel is used for fasteners requiring higher levels of corrosion resistance and is often referred to as marine grade or acid proof.
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These nuts have a nylon insert which grips the bolt thread to prevent loosening. Grade A4 stainless steel is used for fasteners requiring higher levels of corrosion resistance and is often referred to as marine grade or acid proof.