Side-by-Side Comparison
Washers & Retaining Rings
Belleville Washers vs. Sealing & Crush Washers
Comparing 2 standards across 15 specifications. 15 key differences identified.
Comparing:
Belleville Washers
Sealing & Crush 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.
Sealing crush washers create leak-tight fluid seals under compression on hydraulic fittings and automotive drain plugs, standardized under DIN 7603 (Form A solid copper/aluminum, Form C copper-asbestos/elastomer, and bonded Dowty seals).
Specification Comparison Table
15 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 7603 Form A (Solid) / ISO 1179 / SAE J514 |
|
M10 Sealing Washer (DIN 7603)
|
— | ID: 10.0 mm | OD: 14.0 mm | Thickness: 1.0 mm (Copper / Aluminum) |
|
M12 Sealing Washer (Oil Drain Plug)
|
— | ID: 12.0 mm | OD: 16.0 mm to 18.0 mm | Thickness: 1.5 mm |
|
M14 Sealing Washer (Standard Oil Drain)
|
— | ID: 14.0 mm | OD: 18.0 mm to 20.0 mm | Thickness: 1.5 mm |
|
M16 Sealing Washer (Gearbox/Diff)
|
— | ID: 16.0 mm | OD: 22.0 mm | Thickness: 1.5 mm |
|
M18 Sealing Washer
|
— | ID: 18.0 mm | OD: 24.0 mm | Thickness: 1.5 mm |
|
M22 Sealing Washer
|
— | ID: 22.0 mm | OD: 27.0 mm | Thickness: 1.5 mm |
|
Bonded Dowty Seal (Metal + NBR/FKM)
|
— | Steel outer ring with vulcanized inner trapezoidal elastomeric lip (Self-centering) |
|
Plastic Yield Mechanism
|
— | Ductile copper/aluminum crushes plastically into machining micro-grooves upon torquing |