I. Product Function
1. Used together with hex nuts, bolts, and studs. It generates preload through its own elasticity to prevent fasteners from loosening due to vibration, thermal expansion, and contraction;
2. Anti-loosening accessory for complete fastening systems used in pipeline flanges, steel structure workshops, photovoltaic supports, ships, and pressure vessels;
3. Locking, anti-loosening, and cushioning component for municipal water supply and drainage, chemical desulfurization, seawater desalination composite pipelines, equipment bases, curtain wall keels, and light steel purlins.
II. Specification and Standard Parameter Table
Parameter Item | Production Range / Optional Type |
Applicable Standard | GB/T 93, DIN 127, ISO 10648 |
Matching Bolt Size | M3–M64, corresponding one-to-one with bolts and nuts of the same specification |
Forming Process | Stamping from spring steel strip, followed by heat treatment and tempering for enhanced toughness |
Surface Treatment | Carbon steel black oxide treatment, zinc electroplating, hot-dip galvanizing; stainless steel pickling and passivation |
Available Materials | 65Mn manganese steel, 304 stainless steel, 316L stainless steel |
Matching Accessories | Flat washers, hex nuts, various bolts / double-end studs |
III. Material Application Scenarios
1. 65Mn blackened spring washers: suitable for normal-temperature and normal-pressure indoor steel structures and ordinary carbon steel flanges, offering high cost performance;
2. 65Mn zinc-plated spring washers: suitable for outdoor dry workshops and outdoor sections of photovoltaic supports, providing rust prevention and anti-loosening performance;
3. 304 stainless steel spring washers: suitable for exposed freshwater pipelines and non-corrosive municipal pipelines;
4. 316L stainless steel spring washers: suitable for marine seawater pipelines and coastal desulfurization working conditions involving saline corrosion.
IV. Product Advantages
1. The open helical elastic structure continuously rebounds after compression, offsetting thread clearance caused by equipment vibration and providing long-term anti-loosening performance;
2. Balanced hardness and toughness. After heat treatment, it is resistant to fracture, maintains long-lasting elasticity, and does not fail after repeated installation and removal;
3. Full specification coverage allows matching with full ranges of carbon steel and stainless steel fasteners, ensuring complete set supply without dimensional deviation;
4. Stainless steel models resist salt spray, acid, and alkali corrosion, and can be used with composite anti-corrosion pipelines to prevent galvanic corrosion;
5. Easy to install by placing it between the nut and the workpiece, requiring no additional processing and suitable for all flange and steel structure fastening points.