External Tooth Conical Lock Washer

description

1. Enhanced Locking and Corrosion-Proof Performance
   • Formed from 18-8 / 304 austenitic stainless steel and work-hardened to ≈ 220 HV, the conical body stores spring energy while the outward-facing teeth dig into both the fastener underside and joint material, generating prevailing torque that blocks rotation under continuous vibration, shock loading, or thermal cycling.
   • The combined cone angle (≈ 8 °) and tooth height (0.30 – 0.45 mm on M3–M12 sizes) maintain preload as the joint settles, acting as a self-tensioning element that compensates for creep or gasket relaxation.
   • Chromium-oxide passivation delivers permanent immunity to salt spray, food-grade detergents, mild acids, and outdoor moisture across a -200 °C → +400 °C temperature window, removing the red-rust risk found in plated carbon-steel equivalents.
   • Verified by transverse-vibration (Junker) testing to retain ≥ 90 % of initial clamp force after 1 000 cycles and by cyclic salt-fog to resist pitting for 720 h without visible corrosion.
2. Versatile, Cross-Industry Application Spectrum
   • Electronics & Instrumentation: Secures PCB standoffs, display bezels, and EMI shields where low profile, electrical grounding through tooth contact, and non-magnetic material are critical.
   • Medical, Food & Pharmaceutical Equipment: Stainless construction tolerates aggressive wash-downs and autoclave cycles on mixer guards, sensor brackets, and sanitary piping clamps.
   • Transportation & Marine Hardware: Locks lighting brackets, body panels, and deck fittings subjected to road shock, hull vibration, humidity, and salt-laden air.
   • Machinery, Renewable-Energy & Robotics: Maintains clamp integrity on sensor mounts, guard plates, cable glands, and turbine covers during high-cycle duty and rapid axis reversals.
3. Technician-Friendly, Time-Saving Handling
   • Conical design centers automatically under bolt or nut faces, eliminating orientation concerns and accelerating blind, overhead, or gloved assembly.
   • Spring action compensates for torque scatter, allowing installers to use the same torque values as a plain washer without complex re-calculation; the result is consistent preload with standard tools.
   • Overall thickness of 0.5 – 1.0 mm adds minimal stack height, enabling retrofit into existing designs without longer fasteners or clearance changes.
   • Supplied bulk, in resealable pouches, or tape-and-reel strands for seamless integration with maintenance kits, bench stations, and high-speed pick-and-place feeders; optional laser-etched size code (≥ M4) simplifies sorting.
4. Certified Quality & Long-Term Durability
   • 100 % optical inspection confirms tooth height ± 0.02 mm, cone angle ± 0.5 °, and concentricity ≤ 0.05 mm TIR; Cp/Cpk data archived for ISO 9001, IATF 16949, and AS 9100 compliance.
   • Stress-relief tempering eliminates residual forming stresses, preserving high spring modulus for sustained bite through countless tighten/loosen cycles without galling mating surfaces.
   • Electropolished variants achieve Ra ≤ 0.4 µm for hygienic or decorative finishes while maintaining locking performance; low-outgassing options meet vacuum and clean-room standards.
   • QR-coded packaging ties every washer lot to melt chemistry, passivation batch, and inspection record, ensuring full traceability for safety-critical aerospace, medical-device, and infrastructure projects.