DIN982 A2-70 304/A4-80 316 Stainless Steel Thickened Nylon Lock Nut

描述

1. Superior Anti-Loosening & Corrosion-Resistant Performance
   • Built to DIN 982 and offered in two material grades—A2-70 (18-8/304) and A4-80 (316 Mo-bearing)—the lock nut delivers tensile strengths of ≈ 700 MPa and ≈ 800 MPa respectively while retaining ductility from −200 °C up to +400 °C (metal portion).
   • The extra-thick PA 6 nylon collar is press-fitted 1 mm deeper than standard inserts, generating prevailing-torque retention even after 15+ reuses and resisting vibration loosening up to 14 g RMS.
   • Stainless alloy forms a self-healing chromium-oxide film, providing long-term resistance to salt spray, mild acids, cleaning detergents, and outdoor humidity; A4-80 adds molybdenum for superior pitting protection in chloride-rich or chemical environments.
   • Nylon insert remains functional to +120 °C continuous and +140 °C short-term, with UL 94 HB flame rating and dielectric strength > 15 kV /mm—ideal for electrically insulated joints.
2. Wide-Ranging Industrial & Commercial Applications
   • Transportation & Mobility: Secures chassis brackets, brake shields, and fuel-system hangers on cars, railcars, e-bikes, and light aircraft where maintenance intervals are extended.
   • Food, Beverage & Pharmaceutical Equipment: Locks mixer guards, sanitary pipe clamps, and autoclave doors in wash-down zones without galling or bacterial entrapment.
   • Marine, Offshore & Renewable Energy: Fastens deck hardware, winch housings, turbine nacelle covers, and solar-tracker frames exposed to cyclic loading, UV, and salt spray—A4-80 recommended.
   • Electronics, Instrumentation & HVAC: Holds PCB standoffs, sensor enclosures, and ventilation panels where nylon isolation prevents galvanic couples and stray current paths.
3. Technician-Friendly, Time-Saving Handling
   • Chamfered lead-ins and roll-formed ISO-metric Class 6H threads ensure smooth hand-starting, lowering cross-thread risk during blind, overhead, or glove-hand installations.
   • The nylon collar engages only on the final turns, so nuts spin freely until clamp load is required, reducing driver torque demand and battery drain in powered tools.
   • Compatible with all standard hex sockets and wrenches; thick collar offers tactile “bite” feedback when the prevailing torque zone is reached, simplifying quality checks without torque-angle gauges.
   • Delivered in vibration-proof trays, resealable pouches, or tape-and-reel formats that feed manual benches as well as automated pick-and-place systems.
4. Certified Quality & Full Traceability
   • Each production lot undergoes 100 % optical inspection for thread concentricity ≤ 0.03 mm TIR, nylon insertion depth ± 0.1 mm, and prevailing torque per ISO 2320; Cp/Cpk data archived for ISO 9001, IATF 16949, and PPAP Level 3 documentation.
   • Metal components are passivated per ASTM A967; inserts moulded from virgin PA 6 with REACH and RoHS 3 compliance.
   • Optional electropolishing achieves Ra ≤ 0.4 µm for aseptic or decorative requirements; colour-coding of nylon (natural, blue, red, or black) aids line-side identification of thread sizes or torque classes.
   • Each package bears QR-coded labels linking every nut to its melt lot and torque-test record, ensuring end-to-end supply-chain transparency for aerospace, medical, and critical-infrastructure applications.