!The Shank of Eye Coupling Nut is made by Multi-Station Former Cold Forging and the eye is pressed with flating and piercing.Tapped Inner hole is perpendicular and concetric with axis of shank within a tolerance of 0.044",and bearing face has a countersunk, flat end that make Eye Coupling Nut easy fasten with Sleeve Anchor, Wedge Anchor and All Thread Rod,etc.