Mishimoto 4 Inch Stainless Steel Constant Tension T-Bolt Clamp - GoldMishimotos Constant Tension T bolt Clamps are the ideal choice for clamping hoses and couplers that see a wide range of temperature and where high clamping force is needed. This 3. 74" 4. 06" (95mm 103mm) constant tension T bolt clamps takes the superior clamping force of our traditional T bolt clamp and adds even more reliability. A spring on the adjustment bolt allows the clamp to expand and contract with temperature swings while keeping constant