{"id":4143,"date":"2025-07-01T01:58:31","date_gmt":"2025-07-01T08:58:31","guid":{"rendered":"https:\/\/guxiangjs.com\/?post_type=product&p=4143"},"modified":"2025-07-01T01:58:32","modified_gmt":"2025-07-01T08:58:32","slug":"din-7980-a4-stainless-steel-spring-lock-washer-for-cylindrical-head-screws","status":"publish","type":"product","link":"https:\/\/guxiangjs.com\/zh\/shop\/din-7980-a4-stainless-steel-spring-lock-washer-for-cylindrical-head-screws\/","title":{"rendered":"DIN 7980 A4 Stainless Steel Spring Lock Washer for Cylindrical Head Screws"},"content":{"rendered":"
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  1. Robust, Corrosion-Immune Spring-Action Locking
    \n\u2022 Engineered to DIN 7980 dimensions for M6 cylindrical (socket) head screws, the washer is formed from A4 (316) austenitic stainless steel and work-hardened to \u2248 220 HV, delivering a high spring rate that maintains clamp force under vibration, thermal cycling, or joint relaxation.
    \n\u2022 The compressed helical ring exerts a continuous axial load; sharpened coil ends bite into the underside of the screw head and mating surface, blocking rotation without damaging threads.
    \n\u2022 Molybdenum-bearing alloy resists pitting, crevice corrosion, and chloride stress-corrosion cracking in saltwater, chemical-process fluids, industrial cleaners, and disinfectants from \u2212200 \u00b0C to +550 \u00b0C.
    \n\u2022 Meets or outperforms ISO 3506-2 mechanical property requirements and retains \u2265 90 % of initial preload after 1 000 cycles in Junker transverse-vibration testing.<\/li>\n
  2. Wide-Ranging Industrial & Commercial Applications
    \n\u2022 Marine & Offshore Structures: Secures valve covers, deck-fitting brackets, and sensor enclosures exposed to brine spray and galvanic couples.
    \n\u2022 Food, Beverage & Pharmaceutical Equipment: Locks guards, agitator housings, and conveyor modules that undergo caustic wash-downs or steam sterilisation.
    \n\u2022 Chemical Processing & Water Treatment: Maintains torque on pump casings, instrumentation panels, and pipe-flange fasteners subjected to acids, alkalis, and fluctuating temperatures.
    \n\u2022 Renewable-Energy, Robotics & HVAC: Prevents back-off on turbine electronics, servo-motor mounts, and vibration-prone fan assemblies where stainless integrity and compact height are critical.<\/li>\n
  3. Installer-Friendly, Time-Saving Handling
    \n\u2022 Designed specifically for socket-head cap screws\u2014outer diameter nests perfectly under the head, avoiding overhang and keeping assemblies flush inside counterbores.
    \n\u2022 Identical tightening torque to plain washers\u2014no special charts or tools; installers simply follow the standard torque value for an M6 stainless fastener.
    \n\u2022 Chamfered coil ends minimise burrs, enabling smooth feeding through magnetic sockets, vibratory bowls, or automated pick-and-place equipment.
    \n\u2022 Supplied bulk-packed, in resealable pouches, or tape-and-reel strands for integration with field toolkits, bench stations, and high-speed assembly lines; optional laser-etched \u201cM6 A4\u201d code speeds sorting.<\/li>\n
  4. Certified Quality & Long-Term Durability
    \n\u2022 100 % dimensional and hardness inspection verifies free height, gap width, concentricity \u2264 0.05 mm TIR, and spring force; statistical Cp\/Cpk \u2265 1.33 data archived for ISO 9001, IATF 16949, and AS 9100 compliance.
    \n\u2022 Stress-relief tempering eliminates residual forming stresses, ensuring elastic recovery through countless tighten\/loosen cycles without loss of bite.
    \n\u2022 Electropolished variants achieve surface roughness \u2264 0.4 \u00b5m for hygienic or decorative finishes while maintaining locking performance; low-outgassing versions meet clean-room and vacuum service standards.
    \n\u2022 QR-coded carton labels trace every washer lot back to melt chemistry, passivation batch, and mechanical test report, guaranteeing full material transparency for safety-critical aerospace, medical, and infrastructure projects.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Robust, Corrosion-Immune Spring-Action Locking \u2022 Engineered to DIN 7980 dimensions for M6 cylindrical (socket) head screws, the washer is formed from A4 (316) austenitic stainless steel and work-hardened to \u2248 220 HV, delivering a high spring rate that maintains clamp force under vibration, thermal cycling, or joint relaxation. \u2022 The compressed helical ring exerts a […]<\/p>","protected":false},"featured_media":4144,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[176],"product_tag":[],"class_list":["post-4143","product","type-product","status-publish","has-post-thumbnail","product_cat-washer","first","instock","taxable","shipping-taxable","purchasable","product-type-variable"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product\/4143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/comments?post=4143"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/media\/4144"}],"wp:attachment":[{"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/media?parent=4143"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_brand?post=4143"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_cat?post=4143"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/guxiangjs.com\/zh\/wp-json\/wp\/v2\/product_tag?post=4143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}