Heavy Hex Nuts

Heavy Hex Nuts

heavy-hex-nuts-1
heavy-hex-nuts-2

Product Dimensions

ParameterSpecification
Product TypeHeavy Hex Nut
Size RangeM12 – M64 (custom sizes available)
Material OptionsCarbon Steel, Alloy Steel, Stainless Steel
StandardsDIN, ISO, ASTM A194, A563, BS
Surface FinishZinc Plated, Hot-dip Galvanized, Phosphate Coated, Black Oxide

Industrial Applications

Heavy Hex Nuts are widely used in:

  • Electrical panels and assemblies: Provide durable fastening for heavy-duty electrical structures and supports.
  • Automotive and transport industry: Used in trucks, trailers, railways, and heavy vehicles for secure joints.
  • Construction and structural steelwork: Fasten steel beams, columns, and load-bearing frameworks.
  • Oil, gas, and petrochemical plants: Provide high-strength fastening for pipelines, flanges, and pressure vessels.
  • Power plants and machinery: Ensure vibration-resistant fastening in turbines, boilers, and heavy-duty equipment.

Product Description

Heavy Hex Nuts feature larger and thicker dimensions compared to standard hex nuts, providing greater surface contact and higher resistance to loosening under vibration. Their increased size allows for the application of more torque, ensuring reliable fastening in demanding conditions. These nuts are commonly used in bolted joints where high tensile strength is essential, such as structural steel connections, heavy equipment, and pressure systems. Heavy hex nuts are available in various material grades and finishes to meet diverse industrial requirements.

Product specifications

  • Nut Type: Hexagonal with increased thickness and width
  • Size Range: Metric M12 – M64; inch sizes also available (from 1/2″ to 4″)
  • Thread Type: Metric ISO coarse/fine, UNC/UNF, special threads on request
  • Material Options: Carbon steel, mild steel, stainless steel (304/316), alloy steel (Grade 2H, 4, 7, 8, 8M)
  • Surface Finish: Zinc plating, hot-dip galvanization, black oxide, phosphate coating, plain finish
  • Dimensions: Across flats and thickness greater than standard hex nuts per ASTM/DIN specifications
  • Strength Class: Available in ASTM A194 2H, ASTM A563 Grade C, D, and other high-strength grades
  • Tensile Strength: Up to 1,000 MPa depending on material grade
  • Hardness: Typically Rockwell C22–C35 (material dependent)
  • Operating Temperature: -50°C to +500°C depending on base material and heat treatment
  • Corrosion Resistance: Enhanced with stainless steel or coatings; suitable for outdoor and marine use
  • Applications: Structural joints, high-pressure pipelines, pressure vessels, heavy automotive, turbines
  • Standards/Compliance: DIN 934 (heavy series), ASTM A194, ASTM A563, ISO 4034 heavy series, BS standards
  • RoHS/REACH Compliance: Available for specific coatings and stainless versions

Related Products

Crimping Nut

Square Nuts

Thin / Jam Nut

Durlok Nut

Hex Nuts

Large Hex Nuts