Product Specifications
| Model / Specification | M3 – M6 |
| Material | Stainless Steel |
| Size | 3 | 4 | 5 | 6 | |
| d | Min. | 3.2 | 4.3 | 5.3 | 6.4 |
| Max. | 3.5 | 4.6 | 5.6 | 7.76 | |
| dc | Nom. | 10 | 13 | 15 | 18 |
| Min. | 9.55 | 12.45 | 14.45 | 17.45 | |
| Max. | 10.45 | 13.55 | 15.55 | 18.55 | |
| H | Nom. | 2 | 3 | 3 | 3.5 |
| Min. | 1.7 | 2.7 | 2.7 | 3.12 | |
| Max. | 2.3 | 3.3 | 3.3 | 3.88 | |
| h | Nom. | 1.5 | 2.5 | 2.5 | 3 |
| Min. | 1.2 | 2.2 | 2.2 | 2.7 | |
| Max. | 1.8 | 2.8 | 2.8 | 3.3 | |
| r | 0.5 | 0.8 | 0.8 | 1 | |
| R | 1.5 | 2 | 2 | 2.5 | |
| s | 0.4 | 0.4 | 0.5 | 0.5 | |
Conical Basin Washer — Product Introduction
The conical basin washer (standard: Q 416) is an elastic anti-loosening washer with a basin-shaped conical structure, typically manufactured from 65Mn spring steel and quenched and tempered to a hardness of HRC 40–48. Its shape is that of a conical basin; under bolt preload, it undergoes elastic deformation. It is primarily used for anti-loosening and compensation in critical bolted connections, with common surface finishes being oxidation (blackening) or zinc-plated passivation.
I. Product Features
- Conical elastic structure: The washer has a conical basin shape; under load it generates axial elastic deformation, effectively compensating for loosening and settlement of the joint.
- Strong load-bearing capacity: With conical support, contact stress is distributed more evenly than with ordinary flat washers, making it suitable for bearing larger axial loads.
- Excellent anti-loosening performance: Under vibration and impact conditions, the washer’s elastic recovery force continuously applies axial preload, reducing bolt loosening.
- Compact structure: Compared with ordinary spring washers, the basin shape provides stable elastic support within a smaller installation space, ideal for space-constrained locations.
- Standardized dimensions: Manufactured to Q 416 standard, ensuring uniform dimensions and strong interchangeability.
II. Product Advantages
- More reliable anti-loosening: Compared with ordinary spring washers, the conical basin washer’s conical contact and elastic deformation capability are greater, providing more stable anti-loosening performance in heavy-duty and high-vibration environments.
- Uniform stress distribution; protects mating surfaces: The conical structure ensures more uniform clamping force distribution, minimizing the risk of scratching or denting the surfaces of joined components.
- Long service life: Made from spring steel with proper heat treatment, elastic degradation is slow. It maintains good resilience even after multiple assemblies and disassemblies.
- Wide adaptability: Effectively compensates for preload loss caused by temperature changes, material creep, vibration settlement, and similar factors.
- Economical and practical: With a simple structure and moderate manufacturing cost, it is suitable for batch use.
III. Applications
The conical basin washer Q 416 is suitable for bolted connections requiring reliable anti-loosening and elastic compensation, commonly found in:
- Automobiles, tractors, and construction machinery: Engine, chassis, axle, suspension, and other high-vibration connection points.
- Railway vehicles and rail transit equipment: Bogies, braking devices, and connection fasteners.
- Agricultural and mining machinery: Bolted connections subjected to impact and alternating loads.
- General machinery and power equipment: Fastening connections in pumps, compressors, motors, reducers, and similar equipment.
- Other mechanical assemblies with high anti-loosening requirements: Particularly suited for applications with limited axial space that require elastic clamping.
