By Shape

Belleville Washer

A Belleville washer, also known as a disc spring or conical spring washer, is a specially engineered fastener with a conical shape. Unlike flat washers, it functions as a high-capacity spring element, providing substantial axial force and deflection within a compact space to maintain critical bolt preload and compensate for thermal expansion or relaxation in assemblies.

Product details

Typical Applications:

Bolted Joint Preload: Essential in high-pressure flanges, valve assemblies, and critical bolted connections where maintaining a precise, constant clamping force is paramount to prevent leakage or joint failure.
Vibration & Shock Absorption: Used in demanding environments such as heavy machinery, powertrains, and rail systems to dampen vibrations and absorb dynamic loads, preventing fastener loosening.
Thermal Expansion Management: Applied in systems with significant temperature fluctuations (e.g., engines, pipelines) to compensate for the differential expansion and contraction of materials.

Our Product & Custom Capabilities:
We supply Belleville washers in a range of standard sizes and materials, with extensive customization to meet specific load-deflection requirements. Our capabilities include:

Material & Performance: Carbon steel, alloy steel (e.g., 51CrV4), and stainless steel (e.g., 17-7PH) to achieve desired spring characteristics and corrosion resistance.
Geometric Customization: Precise control over key dimensions—including outer/inner diameter, cone height, thickness, and the presence of slots or flat segments—to tailor the spring's force curve (load-deflection characteristics).
Surface Treatment: Plating, phosphating, or specialized coatings to reduce friction and enhance durability in operation.

Our Belleville washers deliver a reliable and space-efficient solution for applications requiring high spring force, controlled preload, and long-term performance stability under extreme conditions.