Carbon Steel Internal Teeth Lock Washer Serrated Internal Design-Anti Slip Vibration Resistant-Rusts Resistant, Sturdy Fastener

description

1. High-Grip, Anti-Vibration Performance
   • Pressed from 65 Mn spring-steel strip (≈ HRC 39–50), the washer’s sharply formed internal teeth bite radially into both the fastener head and the mating surface, generating prevailing torque that offsets bolt-loosening forces produced by vibration or thermal cycling.
   • A ≥ 8 µm electro-zinc layer sealed with trivalent passivation delivers ≥ 120 h neutral-salt-spray protection (ISO 9227); optional clear, yellow, black, olive or any RAL/Pantone powder top-coat extends service life beyond 1 000 h while enabling quick visual coding.
   • Teeth geometry is optimised at a 60 ° flank angle and 0.20–0.35 mm height (M3–M12 range), producing up to 25 % higher break-loose torque than flat spring washers of equal diameter.
   • Meets the locking requirements of DIN 6797 Type J (internal-tooth) and Type A (external-tooth) specifications, allowing repeated reuse without measurable loss of bite.
2. Broad, Cross-Industry Application Spectrum
   • Electronics & Small Appliances: Secures PCB standoffs, terminal lugs and motor housings where low profile and electrical grounding via tooth contact are desirable.
   • Automotive, Powersports & Mobility: Prevents back-off on dashboard assemblies, lighting brackets, fairings and battery clamps exposed to road shock and temperature swings.
   • Machinery, Robotics & Automation: Locks sensor mounts, limit-switch plates and cable glands, sustaining clamp integrity during high-cycle duty and start-stop impact loads.
   • DIY, Furniture & Construction Hardware: Provides hidden anti-slip fastening for shelving brackets, hand tools and frame fixings, while colour-matched coatings blend with visible finishes.
3. Installer-Friendly, Time-Saving Handling
   • Symmetric internal serrations guide the washer square against the fastener head, avoiding the orientation concerns of wedge-lock pairs or split pins.
   • Overall thickness of just 0.3–0.8 mm adds minimal stack height, fitting confined cavities and flush-mount designs without longer screws.
   • Supplied bulk-packed, in resealable field pouches or on tape-and-reel strands, integrating seamlessly with maintenance kits, manual benches and automated pick-and-place feeders.
   • Optional laser-etched size code (≥ M4) enables rapid visual sorting, reducing assembly errors on mixed-size workstations.
4. Proven Quality & Durability
   • 100 % optical inspection verifies tooth height ± 0.02 mm, concentricity ≤ 0.05 mm TIR and hardness per ISO 16228; Cp/Cpk data archived to satisfy ISO 9001 and IATF 16949 audits.
   • Stress-relief tempering after forming minimises hydrogen embrittlement risk and preserves high spring modulus for long-term resiliency.
   • Duplex-coated variants (zinc + epoxy powder) pass 1 000-h Q-SUN xenon exposure without flaking or colour shift, supporting outdoor or chemical-plant use.
   • QR-coded carton labels trace every washer to its melt lot, plating bath and inspection report, guaranteeing end-to-end transparency for safety-critical assemblies in aerospace, medical devices and infrastructure projects.