Flat Washers USS Plain Black Steel Large Low Carbon Grade 2 (ALL SIZES)

🔧 Flat Washers – USS Pattern – Plain Black Steel – Large  – Low Carbon Grade 2 (All Sizes)

Built for strength and stability, these USS Flat Washers are manufactured from low carbon Grade 2 steel with a plain black oxide finish, offering reliable load distribution for a wide range of structural and mechanical applications. Ideal for indoor or covered environments, these washers are a go-to solution where cost efficiency and performance are key.

✅ Key Features:

• USS Pattern (United States Standard):
  Designed with a larger inner diameter (ID) than SAE washers, making these perfect for use with coarse-thread (UNC) bolts and screws. The wider clearance aids alignment during assembly and allows for thermal or mechanical expansion in structural setups.

• Plain Black Steel Finish:
  These washers feature a bare steel surface with a black oxide appearance, providing mild corrosion resistance and a clean, low-glare industrial look. Best suited for indoor, dry, or controlled environments where exposure to moisture is minimal.

• Grade 2 Low Carbon Steel:
  Offers moderate tensile strength (~55,000–60,000 psi) and good ductility. Suitable for general-purpose fastening, including wood-to-metal, metal-to-metal, and light-to-medium mechanical assemblies.

• Excellent Load Distribution:
  Flat washers distribute load under the head of a bolt or nut, preventing surface damage, pull-through, and deformation in softer or thinner materials. Particularly valuable in structural wood framing, automotive, and equipment repair.

• Cost-Effective & Dependable:
  Grade 2 washers are the economical choice for everyday applications that don't require high tensile or corrosion resistance. Manufactured to ASME B18.22.1 standards for dimensional consistency.

🧰 Common Applications:

• General machinery & fabrication

• Electrical panel mounting

• Vehicle maintenance & repair

• Equipment assembly

• Shop fixtures & support systems

• Structural & framing hardware

📦 Product Specifications:

• Material: Low Carbon Steel

• Grade: Grade 2 (non-hardened)

• Finish: Plain (Black Oxide appearance)

• Standard: USS (United States Standard)

• Hardness: Rockwell B40–B60

• Tensile Strength: ~55,000–60,000 psi

• Corrosion Resistance: Low (not intended for outdoor or corrosive environments)

• Conforms To: ASME B18.22.1

📊 Flat Washer – USS Pattern – Black Steel – Size Chart

🛑 Note: Not intended for use in high-moisture or outdoor settings. Use zinc-plated or galvanized alternatives for corrosion resistance.

🔍 Why Choose USS Plain Black Grade 2 Flat Washers?

If you're sourcing fasteners for interior construction, low-cost machinery, or shop-based repairs, these USS-pattern plain washers offer the right mix of size, strength, and affordability. Trusted across manufacturing, automotive, and fabrication industries, they’re a workhorse washer for everyday bolt-and-nut jobs.