Our engineered assemblies withstand severe vibration profiles conforming to the DIN 65151 Junker Test standards, securing persistent joint tension under transverse dynamic forces.
Integrated washers disperse clamping force over an expanded surface area, preventing surface deformation on soft metals, aluminum profiles, or composites.
Available in diverse materials ranging from high-tensile carbon steel (Class 8.8, 10.9, 12.9) to A2/A4 stainless steel with advanced zinc-nickel or black phosphate finishes.
Under-hood automotive environments face constant thermal expansion cycles and continuous harmonic vibration. Our K-lock nuts and integrated flange lock nuts maintain critical clamping forces on exhaust manifolds, structural mounts, and chassis links.
Utility-scale solar farms must survive 25+ years of structural exposure to dynamic wind loads. Pre-assembled lock nuts with external tooth washers ensure reliable ground connections and mechanical security on galvanized steel and anodized aluminum strut networks.
In machinery housings and heavy construction, fasteners must sustain consistent performance without constant torque adjustments. The washer distributes the bearing load over oversized or slotted holes, ensuring security without structural damage to soft substrates.
From Sinsun's founding in 2006, we have evolved into a leading Chinese fastener manufacturer. Explore our key milestones below:
Sinsun established its first manufacturing facility focused specifically on self-tapping and industrial screws, solidifying core fastener expertise.
The Export Department was founded, facilitating direct deliveries of highly specialized hardware to international markets.
Added four spheroidizing annealing furnaces and wire drawing operations to ensure control over raw materials.
Commissioned multi-station cold heading machinery imported from Germany, and integrated Taiwanese manufacturing controls.
Achieved 36,000 tons in annual capacity, delivering over 1,100 export containers to international industrial clients.
Established ready-stock programs within our expanded warehouse to facilitate swift logistics and lower lead times.
Integrated four high-efficiency, computerized heat treatment lines to assure mechanical strength parameters (HRC 28-32, 1000+ MPa).
Transitioning to trivalent zinc coatings and chrome-free zinc flake technologies to meet RoHS and REACH regulations, maintaining 1000+ hour salt spray testing without hazardous compounds.
Deploying multi-camera optical sorting lines to inspect thread configurations, washer presence, and dimensional tolerances, reducing defects toward a target of zero PPM (parts per million).
Developing customized, pre-assembled washer systems that prevent galvanic corrosion when joining dissimilar metals, specifically designed for lightweight automotive frame integration.
