On diameters over 2 1/2 inches

3/4-10 x 9 A307A Hex Bolt Zinc Plated

hollow or grout-filled concrete masonry

5/8-11 x 8 Hex Cap Screw SS 18-8 (A2)

3/4-10 x 24 A307A Hex Bolt Hot Dipped Galvanized

3/8 x 2 Dowel Pin 316 Stainless Steel 1/4-20 Grade 8 Hex Cap Screws Yellow Zinc Plated - Domestic USA On diameters over 2 1/23 8 x 2 Dowel Pin 316 Stainless Steel . Dowel pins are solid, headless straight pins with a closely controlled diameter. They are widely used as plug gages, hinges or shafts. The precise tolerances in dowel pins make them excellent for achieving proper alignment of parts in high speed assemblies or as roller bearing in bus and truck wheel assemblies. Dowel pins should be installed by being pressed in, not struck with an impact force.