DIN6795 SS304 Stainless Steel French Grounding Washer

描述

1. High-Conductivity, Corrosion-Proof Grounding Performance
   • Stamped from 18-8 / 304 austenitic stainless steel, then work-hardened to ≈ 210 HV, the washer’s double-arched “French” profile maintains a constant spring load that presses the circumferential teeth firmly into both mating surfaces, creating a low-resistance electrical path while locking the joint against vibration.
   • Tooth geometry—60 ° flank angle, 0.25 – 0.40 mm height (M3 – M10 range)—achieves contact resistances below 10 mΩ even after 1 000 temperature cycles between −40 °C and +120 °C.
   • The self-healing chromium-oxide film guards against salt-spray, industrial cleaners, and mild acids from −200 °C to +400 °C, eliminating red-rust risk without the galvanic issues of plated steel parts.
   • Meets DIN 6795 electrical-continuity criteria and retains ≥ 90 % of initial preload after Junker vibration testing, ensuring both mechanical integrity and dependable earthing.
2. Versatile Application Spectrum Across Industries
   • Electrical Enclosures & Switchgear: Provides gas-tight continuity between sheet-metal doors, hinges, and ground buses, preventing EMI leakage and static build-up.
   • Telecommunications & Data Centers: Grounds rack rails, cable trays, and panel assemblies where non-magnetic stainless steel avoids signal interference.
   • Renewable Energy & EV Infrastructure: Locks and bonds inverter housings, battery enclosures, and charge-point panels exposed to outdoor weather cycles.
   • Industrial Automation & Robotics: Maintains low-ohm grounding of sensor brackets, guard plates, and control-cabinet backplanes subject to continual vibration.
3. Installer-Friendly, Time-Saving Handling
   • Symmetric arched shape automatically centers under screw or nut faces, removing alignment guesswork and speeding overhead or blind assembly—even with gloved hands.
   • Spring action compensates for paint thickness, plating build-up, and joint relaxation, so installers can use standard torque values for plain washers without recalculation.
   • Low overall height (0.4 – 0.9 mm added stack) allows retrofit into existing designs without longer fasteners or altered counterbore depths.
   • Supplied bulk, in resealable pouches, or on tape-and-reel strands for seamless integration with field service kits, bench stations, and high-speed pick-and-place feeders; optional laser-etched size code (≥ M4) simplifies sorting on multi-size lines.
4. Certified Quality & Long-Term Durability
   • 100 % optical inspection verifies tooth height ± 0.02 mm, arch depth ± 0.05 mm, and concentricity ≤ 0.05 mm TIR; Cp/Cpk ≥ 1.33 reports support ISO 9001, IATF 16949, and AS 9100 audits.
   • Stress-relief tempering eliminates residual forming stresses, preserving spring modulus for countless tighten/loosen cycles without loss of electrical integrity.
   • Electropolished variants achieve surface roughness ≤ 0.4 µm for hygienic or decorative finishes while maintaining locking and grounding performance; low-outgassing options satisfy clean-room and vacuum requirements.
   • QR-coded packaging traces every lot to melt chemistry, passivation batch, and electrical-continuity test report, delivering full transparency for safety-critical aerospace, medical-device, and public-infrastructure projects.