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Spring Lock Washers

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Belleville Spring Lock Washers, also known as conical washers, are designed to provide high load-bearing capacity and maintain tension in bolted assemblies. The conical shape of the washer allows it to act like a spring, applying continuous pressure on the fastener to prevent loosening, even in dynamic or high-vibration environments.

Belleville Spring Lock Washers for Socket Head Screws

Belleville Spring Lock Washers for Socket Head Screws are specifically designed to maintain tension in assemblies using socket head screws. The conical shape of the Belleville washer applies continuous pressure to the screw, preventing loosening and ensuring a secure fit, even in high-vibration or dynamic load environments.

Metric Spring Lock Washers

Metric Spring Lock Washers are designed to prevent loosening in fasteners that use metric measurements. These washers feature a helical shape that exerts tension when compressed, creating friction and ensuring that the fastener remains tight, particularly in high-vibration or dynamic load environments.

Spring Lock Washers for Slotted Bearing Nuts

Spring Lock Washers for Slotted Bearing Nuts are designed to provide tension and prevent the slotted bearing nuts from loosening during operation. The spring action of the washer helps maintain the tightness of the nut, especially in applications involving dynamic loads or vibration.

Spring Lock Washers for Plastic Screws

These washers offer tension to prevent loosening without applying excessive force that could damage the plastic fasteners. They are ideal for applications where lightweight and non-conductive materials are needed.

Spring lock washers are designed to maintain tension between a fastener and the mating surface, preventing loosening caused by vibration, thermal expansion, or dynamic loading. Unlike tooth lock washers that rely on biting teeth, spring lock washers work through their curved or conical profile, which compresses under load and continues to exert axial spring force even as the assembly experiences minor movement or settling over time. This makes them particularly effective in applications where consistent clamping force is critical, such as bearing assemblies, machinery mounts, and precision equipment.

Spring lock washers are widely used across industrial machinery, automotive systems, bearing housings, and general fastening applications where maintaining preload and preventing joint loosening are essential to performance and safety.

Within this category, Lily Bearing offers a range of spring lock washer types engineered for specific fastener types and application requirements:

Belleville Spring Lock Washers – Also known as conical washers, these are designed with a cone-shaped profile to provide high load-bearing capacity and maintain tension in high-load or high-temperature applications.
Belleville Spring Lock Washers for Socket Head Screws – A specialized version of the Belleville design, sized to fit under socket head screws while maintaining tension in the assembly.
Metric Spring Lock Washers – Featuring a helical spring profile sized to metric fastener standards, designed to prevent loosening in metric bolt and nut assemblies.
Spring Lock Washers for Slotted Bearing Nuts – Purpose-built to work with slotted bearing nuts, providing tension to prevent the nut from loosening during operation, particularly in rotating machinery and bearing housings.
Spring Lock Washers for Plastic Screws – Designed to apply sufficient tension to prevent loosening without exerting excessive force that could damage or crack plastic fasteners, making them ideal for lightweight or delicate assemblies.

Each subcategory is available in multiple sizes and material options (including stainless steel and carbon steel) to accommodate different load, temperature, and application requirements.

Frequently Asked Questions

What Is the Difference Between a Belleville Spring Washer and a Standard Spring Lock Washer?

Belleville washers have a cone-shaped (conical) profile that provides very high load-bearing capacity and can accommodate significant deflection, making them ideal for high-load or high-temperature applications. Standard spring lock washers typically have a simpler helical or curved profile designed primarily for vibration resistance in general fastening applications.

When Should I Use Spring Lock Washers for Slotted Bearing Nuts?

These washers are specifically designed to work with slotted bearing nuts commonly found in rotating machinery. They provide continuous tension against the nut, preventing it from backing off during operation, which helps maintain proper bearing preload and alignment.

Are Spring Lock Washers Suitable for Use With Plastic Fasteners?

Standard spring lock washers can apply too much localized force and damage plastic screws. For these applications, Spring Lock Washers for Plastic Screws are designed to provide adequate tension while distributing force more gently to avoid cracking or stripping the plastic fastener.

Why Would I Choose a Belleville Washer for Socket Head Screws Specifically?

Standard Belleville washers may not seat correctly under the smaller head profile of socket head screws. The socket-head-specific version is sized to fit properly beneath these screws while still delivering the same high-load spring tension characteristic of Belleville washers.

How Do I Know Whether to Use a Metric or Standard Spring Lock Washer?

This depends on the fastener standard used in your assembly. Metric spring lock washers are sized to match metric bolts and nuts, so it's important to match the washer type to your fastener's measurement system and diameter.

Can Belleville Spring Washers Be Stacked for Higher Load Capacity?

Yes, Belleville washers are often stacked in series or parallel configurations to increase deflection or load capacity as needed for specific applications. Consult application-specific engineering guidelines to determine the appropriate stacking configuration for your load requirements.