Vibrant Performance Stainless Steel spring loaded T-bolt Clamps are constructed entirely from a 300 series stainless steel that features a zinc plated steel t-bolt, lock nut and spring. Vibrant Performance stainless steel spring loaded t-bolt clamps compensate for fluctuations in all types of hoses that experience thermal and/or pressure changes that cause a hose to expand or contract. They are available in diameters that support Vibrant I.D. hose couplings ranging from 2? ǥ to 6? ǥ.