Our protection cap fits tightly, by means of the special rib around its mouth, assuring protection against corrosion or damage. It can protect with a more tight seal different elements and combinations, like 2 nuts and a bolt. It consists of a two-part cap. The upper part is a smaller cap for protecting a protruding bolt of a nut and bolt assembly. This upper part can be adjusted in height, sliding it up and down, to fit your needs.