HOME / FASTENER SOLUTIONS / WASHERS / THRU HARDENED / F436 PLAIN
REQUEST FOR QUOTE
  • Plain Finish Industrial F436 Thru Hardened Flat Washers

F436 Structural Flat Washer with Plain Finish

Narrow Your Results By:

F436 Structural Flat Washers – Heavy-Duty Performance for Steel-to-Steel Connections

When your project demands strength, reliability, and code compliance, F436 structural flat washers are the go-to solution. Engineered specifically for heavy-duty structural applications, these washers are designed to provide the durability and load distribution necessary in critical steel-to-steel assemblies.

Made from through-hardened carbon steel or alloy steel, F436 washers are heat-treated to precise mechanical properties, ensuring high strength and resistance to deformation under extreme loads. They're commonly paired with ASTM A325 and A490 structural bolts, making them ideal for bridges, buildings, wind towers, and steel fabrication projects.

Material & Coating Options:

  • Material: Medium carbon steel or alloy steel

  • Coatings: Available in Plain (uncoated), Hot-Dip Galvanized for superior corrosion resistance, and Zinc-Plated (Clear Zinc Cr3) for indoor or mildly corrosive environments

Dimensions & Tolerances:

  • Sizes: Typically available from 1/2" up to 1-1/2" inner diameters

  • Tolerances: Tight manufacturing tolerances for optimal bolt-hole alignment and performance

  • Thickness: Thicker than standard flat washers to meet heavy-duty requirements

Mechanical Properties:

  • Hardness: 38-45 HRC (Rockwell), ensuring resistance to galling and embedding

  • Strength: Capable of withstanding high clamping forces without crushing or distorting

Standard Compliance:

  • Meets ASTM F436 specifications for structural flat washers

  • Often used in conjunction with fasteners meeting ASTM A325, A490, or SAE J429 Grade 8

Applications:

  • Steel-to-steel structural connections

  • Heavy equipment assembly

  • Wind turbines, bridges, and high-rise buildings

  • Infrastructure and energy sector fastenings

F436 structural washers provide the strength and precision required in high-load environments. Need to ensure your assembly meets code and performs under pressure? Our experts are ready to help you select the right F436 washer for your application.