HEAVY HEX STURCTURAL NUTS  (ASTM A563)

Nut Standard:

• ASTM A563 - Heavy hex structural nuts

Material and Properties:

• Carbon steel

• Plain carbon steel (e.g. C10, C15, C22)

• Alloy steel (e.g. 34CrMo4, 40CrMnMoS8-6)

• Provides good strength and hardness

• Stainless steel

• Austenitic (e.g. A2, A4) - Excellent corrosion resistance

• Martensitic (e.g. 1.4006, 1.4021) - Good corrosion resistance and strength

Strength Grades:

• Heavy hex structural nuts are available in various strength grades, including:

• Grade A - Minimum proof strength of 105 ksi (725 MPa)

• Grade C - Minimum proof strength of 130 ksi (900 MPa)

• Grade DH - Minimum proof strength of 150 ksi (1035 MPa)

Applications:

• High-strength structural connections

• Heavy equipment, machinery, bridges, buildings

• Corrosive environments (stainless steel versions)

Coatings and Finishes:

• Plain (uncoated)

• Zinc plated (for mild corrosion resistance)

• Hot-dip galvanized (for better corrosion resistance)

• Stainless steel nuts may have a passivation or polishing finish

 Dimensions: