M12 Helical Spring Lock Washer – Yellow Zinc Plated

Secure Your Assemblies with Unyielding Grip

Ensure your critical bolted connections remain tight and secure, even under the most intense vibration and stress, with the Buyers Products M12 Helical Spring Lock Washer. Designed for uncompromising performance, this essential piece of hardware is engineered to prevent the loosening of nuts and bolts, a common point of failure in dynamic machinery and equipment. By exerting a continuous spring force against the fastener head and the substrate, it creates powerful friction and resistance against back-off rotation. This simple yet incredibly effective component is a must-have for any application where reliability is paramount, from vehicle assembly to industrial machinery maintenance, providing peace of mind that your connections will hold firm day in and day out.

Engineered for Durability and Corrosion Resistance

The performance of a lock washer is defined by its material and construction. This M12 washer is forged from high-quality, hardened steel to withstand immense compressive forces without deforming. What truly sets it apart is its superior yellow zinc plated finish. This coating provides a robust barrier against rust and corrosion, significantly outperforming standard zinc finishes. It’s an ideal choice for components exposed to moisture, road salt, and harsh environmental conditions, ensuring long-term integrity and preventing premature failure due to rust. This enhanced durability makes it a reliable choice for automotive, marine, and outdoor applications where components are constantly challenged by the elements.

Versatile Application for Demanding Industries

The M12 size is one of the most common fastener dimensions used across a wide range of industries, making this lock washer an incredibly versatile and valuable part for any workshop or job site. It is an indispensable component in the assembly and repair of trucks, trailers, plows, and spreaders—the very equipment that forms the core of the Buyers Products catalog. Mechanics, fabricators, and maintenance professionals rely on these washers for everything from securing suspension components and engine mounts to assembling structural frames and industrial equipment. Whether you are performing a critical repair or building new machinery, having a supply of these high-quality lock washers is essential for ensuring a safe and lasting result. For other essential hardware, be sure to browse our Uncategorized section for more components.

• Part Number: 3009979
• Type: Helical Spring Lock Washer
• Fastener Size: M12
• Inner Diameter: Designed to fit 12mm bolts and screws
• Material: High-Strength Hardened Steel
• Finish: Yellow Zinc Plated
• Primary Function: Prevents nuts and bolts from loosening under vibration
• Mechanism: Split-ring design exerts spring force to maintain tension
• Corrosion Resistance: Superior protection against rust, moisture, and environmental factors
• Applications: Automotive, trucking, heavy equipment, industrial machinery, construction, and marine
• Design: Split ring with precisely angled ends that bite into the nut and mating surface for maximum grip
• Industry Standard: Meets or exceeds standard specifications for mechanical and dimensional properties