Side-by-Side Comparison
Washers & Retaining Rings
Belleville Washers vs. Lock Washers
Comparing 2 standards across 14 specifications. 14 key differences identified.
Comparing:
Belleville Washers
Lock Washers
The Belleville Washer (Conical Disc Spring / Cupped Spring Washer, standardized under DIN 2093 and DIN 6796) is a conical annular spring disc engineered to deliver massive axial spring clamping force across sub-millimeter deflection distances, maintaining bolted joint tension under extreme thermal expansion and dynamic vibration.
Lock washers resist bolt loosening under vibration through spring preload and mechanical biting, standardized under DIN 127 (helical split spring washers), DIN 6798 (internal/external serrated tooth star washers), and DIN 2093 (Belleville conical spring discs).
Specification Comparison Table
14 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standard Specifications
|
DIN 2093 (Precision disc springs) / DIN 6796 (Heavy-duty bolted joints) / ISO 19643 | — |
|
Conical Geometry
|
Frusto-conical cup shape (cone height ≈ 0.5× to 0.7× disc thickness) | — |
|
Load Capacity
|
Extreme axial spring force (thousands of newtons in sub-millimeter stroke) | — |
|
Stacking Capabilities
|
Parallel Stacking (nests together to multiply load) or Series Stacking (tips touch to multiply deflection) | — |
|
Standard Materials
|
51CrV4 chrome-vanadium spring steel / 17-7 PH stainless / Inconel 718 (high temp) | — |
|
Primary Applications
|
High-voltage electrical busbars, engine cylinder heads, cryogenic piping, wind turbine bolts | — |
|
Governing Standards
|
— | DIN 127 Form B / DIN 6798 / DIN 2093 / ASME B18.21.1 |
|
Helical Split Washer Mechanism
|
— | Spring tension + sharp trapezoidal edges that bite into mating surfaces under counter-rotation |
|
M6 DIN 127 Split Lock Washer
|
— | ID: 6.1 mm | OD: 11.8 mm | Thickness (s): 1.6 mm | Uncompressed Free Height: ~3.2 mm |
|
M8 DIN 127 Split Lock Washer
|
— | ID: 8.1 mm | OD: 14.8 mm | Thickness (s): 2.0 mm | Uncompressed Free Height: ~4.0 mm |
|
M10 DIN 127 Split Lock Washer
|
— | ID: 10.2 mm | OD: 18.1 mm | Thickness (s): 2.2 mm | Uncompressed Free Height: ~4.4 mm |
|
M12 DIN 127 Split Lock Washer
|
— | ID: 12.2 mm | OD: 21.1 mm | Thickness (s): 2.5 mm | Uncompressed Free Height: ~5.0 mm |
|
Belleville Disc Spring (DIN 2093)
|
— | Conical shape maintains thousands of pounds of preload over high thermal expansion cycles |
|
Serrated Tooth Star Washer (DIN 6798)
|
— | Multiple teeth bite through paint/anodizing to ensure electrical bonding and ground continuity |