Flat Washer Hot Dipped Galvanized USS (ALL SIZES)

🔩 Flat Washer - USS Pattern - Hot Dipped Galvanized - Low Carbon Steel (All Sizes)

Upgrade your construction and fastening projects with our USS Flat Washers made from low carbon steel and protected with a rugged hot dipped galvanized finish. These washers are specifically engineered for heavy-duty applications requiring superior corrosion resistance, load distribution, and longevity in harsh environments.

✅ Key Features:

• Hot Dipped Galvanized Coating:
  A thick zinc coating is applied by dipping the washer in molten zinc, forming a bonded, corrosion-resistant surface ideal for outdoor, marine, and treated wood applications. Far more durable than standard zinc plating, this process delivers excellent rust resistance even in high-humidity or salt-exposed environments.

• USS Pattern Dimensions (United States Standard):
  Designed with a larger inside diameter compared to SAE washers. This allows a looser fit around bolts with coarse (UNC) threads, reducing stress concentrations and allowing easier alignment in structural applications.

• Load Distribution & Surface Protection:
  Helps evenly spread the clamping force of a bolt or screw, preventing marring or damage to soft materials such as wood or aluminum. Also reduces the risk of pull-through under heavy loads.

• Material & Strength:
  Constructed from low carbon steel offering sufficient tensile strength (~45,000 psi) for structural-grade applications such as deck framing, metal-to-wood connections, and utility pole hardware. These washers comply with ASME B18.22.1 standards and are suitable for pairing with ASTM A307 Grade A bolts or equivalent.

• Versatile Applications:

  • Construction: Post and beam framing, concrete formwork, heavy timber fastening

  • Infrastructure: Guardrails, bridges, pipelines, utility hardware

  • Marine & Agricultural: Docks, fencing, equipment exposed to weather

  • DIY & Home Repair: Decks, pergolas, structural wood projects

• Compliance & Quality Assurance:
  Meets or exceeds the dimensional and material standards for USS flat washers. Manufactured with tight tolerances for consistent fit and performance.

📦 Product Specifications:

• Material: Low Carbon Steel

• Finish: Hot Dipped Galvanized (HDG)

• Washer Type: Flat, USS Pattern

• Standard: ASME B18.22.1

• Hardness: Typically Rockwell B50–B85

• Tensile Strength: ~45,000 psi (not intended for high-strength bolting applications like A325 or A490)

• Corrosion Resistance: Excellent (rated for long-term exterior use)

📌 Why Choose USS Hot Dipped Galvanized Washers?

If you're building with pressure-treated lumber, working in coastal environments, or handling large structural hardware, these washers provide the reliability and endurance you need. Compared to zinc-plated