Stainless Steel Flat Washers

Stainless Steel Flat Washers – Types and Grades

Stainless steel flat washers are essential components in fastening systems, providing a smooth, stable surface that distributes load, prevents damage to materials, and ensures secure fastening. Known for their strength, corrosion resistance, and versatility, stainless steel flat washers are widely used in construction, automotive, marine, and industrial applications. They come in various types and grades, each suited for specific performance requirements.

Types of Stainless Steel Flat Washers

• USS (Unified Standard Series) Flat Washers – Larger inside and outside diameters, commonly used in construction and heavy-duty applications.

• SAE (Society of Automotive Engineers) Flat Washers – Smaller, more precise dimensions, often used in automotive and machinery applications where tighter tolerances are required.

• Fender Washers – Feature a wide outside diameter for maximum load distribution, commonly used with thin sheet materials.

• Finishing Washers – Designed with a decorative finish to provide a neat, polished appearance while securing fasteners.

• Lock Washers (when used with flat washers) – Provide extra resistance against loosening caused by vibration.

Grades of Stainless Steel

• 18-8 Stainless Steel (Grade 304) – The most common grade, offering excellent corrosion resistance, strength, and affordability. Ideal for general-purpose applications.

• 316 Stainless Steel – Contains molybdenum for superior corrosion resistance in marine and chemical environments, making it a top choice for saltwater or highly corrosive conditions.

• 410 Stainless Steel – Heat-treated and hardened, providing high strength and wear resistance but lower corrosion resistance compared to 304 or 316.

By selecting the right type and grade of stainless steel flat washer, users can ensure optimal performance, long-lasting fastening, and resistance to environmental challenges.

Key Features:

• Provides load distribution and prevents surface damage

• Available in USS, SAE, fender, and finishing types

• Offered in 18-8 (304), 316, and 410 stainless steel grades

• Ideal for automotive, marine, construction, and industrial use