Product Details

Our Partially Threaded DIN 6921 Hex Flange Bolts are defined by their unique geometry and protective coating. The partially threaded design incorporates a smooth, unthreaded shank (grip length) that is designed to bear shear loads, making it significantly stronger in these applications than a fully threaded bolt. This ensures that the threads are protected from damaging lateral forces and that the joint maintains precise alignment.

The fastener is coated with Yellow Zinc Plating (YZP). This two-step process involves electroplating a layer of zinc onto the carbon steel bolt, followed by the application of a yellow chromate conversion coating. This chromate layer not only gives the bolt its distinctive iridescent gold finish but also provides a significant increase in corrosion resistance compared to standard clear or blue zinc plating, making it suitable for use in moderately corrosive environments. The integrated flange distributes clamping pressure over a wider area, preventing pull-through and enhancing the bolt’s resistance to vibrational loosening.

Product Parameters

The technical specifications for our Yellow Zinc Plated Partially Threaded DIN 6921 Hex Flange Bolts are provided below for your reference.

Product Features

These bolts are engineered with several key features to deliver exceptional performance in demanding applications:

• Superior Shear Strength: The solid, unthreaded portion of the shank provides maximum resistance to lateral and shear forces, ensuring joint integrity in critical structural connections.
• Enhanced Corrosion Resistance: The Yellow Zinc Plated finish with a chromate conversion coating offers robust protection against rust and corrosion, outperforming standard clear zinc finishes.
• Integrated Anti-Vibration Flange: The built-in flange acts as a washer to distribute load, protect the joint surface, and provide excellent resistance to loosening in high-vibration environments.
• High-Tensile Strength: Forged from high-quality carbon steel and available in high-strength grades (e.g., 8.8, 10.9), these bolts provide the reliable clamping force needed for heavy-duty applications.
• DIN 6921 Standard Compliance: Manufactured to precise international standards, guaranteeing dimensional accuracy, consistent quality, and full interchangeability.

Product Applications

The combination of shear strength and enhanced corrosion protection makes these bolts highly suitable for a variety of industries:

• Automotive Industry: Widely used for securing suspension components, engine mounts, subframes, and other chassis parts that are subject to both shear stress and environmental exposure.
• Agricultural Machinery: Ideal for assembling tractors, plows, harvesters, and other farm equipment where durability and resistance to moisture and fertilizers are required.
• Construction & Heavy Equipment: Perfect for assembling construction machinery, heavy-duty rigging, and other equipment where strong, vibration-resistant joints are critical.
• General Industrial Assembly: An excellent choice for mechanical equipment, conveyor systems, and manufacturing machinery that requires a robust fastener with good environmental resistance.