The bolt that maintains the alignment of the leaves in a leaf spring, and the position of the axle on the springs are Centre Bolts. The spring center bolt fastens the leaves together, and its head locates the spring in the front axle beam or saddle on the rear axle housing.  These replacement spring center bolts are made of grade 8 material and Sold in pairs. Centre bolts are available in different sizes and quality to fulfill your different requirement  

The bolt that maintains the alignment of the leaves in a leaf spring, and the position of the axle on the springs are Centre Bolts. The spring center bolt fastens the leaves together, and its head locates the spring in the front axle beam or saddle on the rear axle housing.  These replacement spring center bolts are made of grade 8 material and Sold in pairs. Centre bolts are available in different sizes and quality to fulfill your different requirement