On diameters over 1 inch to 1 1/2 hardness will range from HRC 19-30

All material is manufactured with rolled threads

Silicon Bronze Finished Hex Nuts are similar to low carbon steel in hardness but offer high resistance to corrosive environments such as sea water

1/8 Heavy Duty Jobber Drill Bit

1 1/16 x 6 Reduced Shank Drill Bit (1/2 Shank) 3/4-10 A307 Grade A Carriage Bolts Hot Dipped Galvanized On diameters over 1 inch1 1 16 x 6 Reduced Shank Drill Bit (1 2 Shank) . Expands the size range capacity of a 1 2 inch portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.