Fully threaded stud bolt is a straight cylindrical bar with continuous thread on the whole length, no head. It is matched with two nuts to clamp workpieces from both sides. Common strength classes: 8.8,10.9,12.9. Material: carbon steel or alloy steel; finishes: blue-white zinc plated, color zinc plated, Dacromet, black oxide. Widely used for flange connection, chemical industry, pressure vessel, metal structure.