DIN 9021

Large Plain Washers OD=3xID

Large Plain Washers OD=3xID

Technical Specification:

  • Large Plain Washers OD=3xID
  • DIN 9021
  • Diameter: Metric or Inch

Possible materials:

  • ISO: 8.8., 10.9, 12.9
  • ISO: A2, A4
  • ANSI/ASME: A193-B7, A320-L7, A307
  • ANSI/ASME: A193-B8(M) Cl.1 & Cl.2
  • DIN Werkstoff: 42CrMo4, 25CrMo4

Possible coatings:

  • Carbon steel: Hot-dip Galvanizing, Geomet-500, Zinc, Zinc-Nickel, PTFE/Xylan, TAKECOAT-1000
  • Stainless steel: PTFE/Xylan, TAKECOAT-1000


  • Structural
  • Machinery equipment
  • Automotive
  • Aerospace

Enhancing Fastener Stability: DIN 9021 Flat Fender Washer OD=3xD

DIN 9021 Flat Fender Washer OD=3xD emerges as a versatile solution, fortifying connections and offering unique benefits in specific applications. Renowned for its wide outer diameter and flat design, this washer plays a pivotal role in distributing loads and providing additional support, setting itself apart from conventional washers such as DIN 125, DIN 127, and DIN 6916. Let’s explore the characteristics, applications, and key distinctions of DIN 9021, unveiling its significance in enhancing fastener stability.

Characteristics of DIN 9021 Flat Fender Washer OD=3xD:

DIN 9021 Flat Fender Washer OD=3xD is characterized by its large outer diameter, typically three times the diameter of the fastener, and a flat profile. These washers are designed to provide ample bearing surface and distribute loads over a wider area, reducing the risk of surface damage and ensuring uniform clamping force. Manufactured from high-quality materials such as steel or stainless steel, DIN 9021 washers offer durability and reliability in various operating conditions.

Applications and Versatility:

DIN 9021 Flat Fender Washer OD=3xD finds versatile application across industries and sectors where stability and support are essential. Some common applications include:

  • Woodworking and Carpentry: In woodworking projects, furniture assembly, and cabinetry, DIN 9021 washers are used to provide additional support and reinforcement to fastener connections. Their wide outer diameter helps prevent pull-through in soft materials such as wood, ensuring a secure and stable assembly.
  • Outdoor Structures and Decking: DIN 9021 washers are employed in outdoor structures, decking, and fencing applications, where they help distribute loads and minimize the risk of fastener protrusion. Their flat design and wide bearing surface make them ideal for use with bolts and screws in outdoor environments exposed to weathering and moisture.
  • Automotive and Marine Applications: In automotive and marine applications, DIN 9021 washers provide essential support and stability to fastener connections in engine compartments, chassis assemblies, and marine hardware. Their large outer diameter and flat profile help prevent fastener loosening and ensure reliable performance under dynamic loads and vibrations.

Key Distinctions from Conventional Washers:

  • Wide Outer Diameter: Unlike DIN 125, DIN 127, and DIN 6916 washers, which have standard outer diameters, DIN 9021 Flat Fender Washer OD=3xD features a larger outer diameter, typically three times the diameter of the fastener. This wider diameter provides enhanced load distribution and support, particularly in soft or fragile materials.
  • Flat Profile: While DIN 127 Spring Lock Washer and DIN 6916 High Strength Structural Washer have curved or helical profiles, DIN 9021 Flat Fender Washer OD=3xD features a flat design. This flat profile ensures uniform clamping force and minimizes the risk of surface damage, making it suitable for use in delicate materials or applications requiring flush mounting.
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