Stainless steel thimbles are designed as a reinforcement to wire rope loops or cable eyes. The wire is simply looped around the groove of the thimble and then secured into place with a wire rope grip or ferrule. Stainless Steel Wire Rope Thimbles. Manufactured from high quality AISI 316 grade stainless steel. Highly polished and corrosion resistant. SS thimbles re-inforce the eye and result in a longer lasting and more permanent fitting. Wear is reduced and the loop is supported by the strength of the thimble itself. The size of thimble selected should correspond to the size of the rope or wire rope being used.