Our standard duty T-bolt clamps use a spring loaded bolt to provide constant pressure on the tubing by adjusting with it, eliminating "cold flow" leakage. They work geat for high vibration and large diameter applications in heavy trucks, industrial machinery, heavy-duty agriculture and off road equipment etc. They feature a 3/4" wide 300 stainless steel smooth band so that soft hoses don't get damaged, a zinc plated steel bolt and 7/16" zinc plated steel nut, and a 300 stainless steel bridge and trunnion.