flat washer

Specification Highlights:

• Material Options:

  • Carbon steel

  • Stainless steel (SS304, SS316)

  • Brass

  • Aluminum

  • Nylon / Plastic

  • Copper

  • Hardened steel (for heavy-duty applications)

• Standards & Types:

  • DIN 125 / ISO 7089 – Standard flat washer

  • DIN 9021 – Large outer diameter flat washer

  • SAE washers – Smaller OD than USS

  • USS washers – Larger OD than SAE

  • IS 2016 – Indian standard flat washer

• Size Range:

  • Inner Diameter (ID): M3 to M64 (metric)

  • Outer Diameter (OD): As per standard (can vary by DIN/SAE/USS)

  • Thickness: 0.5 mm to 6 mm or more

• Finish / Coating:

  • Zinc plated (white/yellow/blue)

  • Black oxide

  • Nickel/chrome plated

  • Hot-dip galvanized

  • Plain/self-finish

  • Passivated (for stainless steel)

• Applications:

  • Load distribution under nuts and bolts

  • Surface protection of assemblies

  • Preventing loosening due to vibration

  • Insulation (for nylon/plastic washers)

  • Spacing or shimming components

• Key Features:

  • Provides even load distribution to prevent material damage

  • Increases bearing surface area under fastener

  • Available in various sizes and materials for all environments

  • Prevents pull-through of fasteners in softer materials

  • Corrosion-resistant options for outdoor and marine use