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 andor 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 to 6.