{"title":"Dual Lock Washers SUS316 (A4) Stainless Steel","description":"\u003ch2\u003eDual Lock Washers – SUS316 (A4) Stainless Steel\u003c\/h2\u003e\n\n\u003cp\u003eFULLERKREG Dual Lock Washers in \u003cstrong\u003eSUS316 (A4) stainless steel\u003c\/strong\u003e deliver superior vibration-resistant fastening for the most demanding corrosive environments. Engineered to DIN 25201 wedge-locking principles, each pair of cam-faced washers interlocks under load — the greater the loosening force, the tighter the grip. Ideal for \u003cstrong\u003emarine, offshore, chemical processing, food \u0026amp; beverage, and pharmaceutical\u003c\/strong\u003e applications where both corrosion resistance and reliable anti-loosening performance are non-negotiable.\u003c\/p\u003e\n\n\u003cp style=\"background:#fff8e1; border-left:5px solid #f9a825; padding:14px 18px; margin:20px 0; font-size:1.05em; font-weight:600; color:#333;\"\u003e\n  ⚠️ \u003cstrong\u003eDimensional Compatibility Notice:\u003c\/strong\u003e Tolerances and mechanical specifications comparable to Nord-Lock®, Twin-Lock® and Heico-Lock® brand locking washers.\n\u003c\/p\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Surface Treatment\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eDetails\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial Grade\u003c\/td\u003e\n      \u003ctd\u003eSUS316 \/ A4 Stainless Steel (316L)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSurface Treatment\u003c\/td\u003e\n      \u003ctd\u003ePickled（洗白）· Passivated（钝化）· Hardened（硬化）\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n      \u003ctd\u003eExcellent — suitable for chloride-rich, marine, and acidic environments\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eHardness\u003c\/td\u003e\n      \u003ctd\u003e≥ 390 HV (hardened for effective wedge-locking function)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTemperature Range\u003c\/td\u003e\n      \u003ctd\u003e-60°C to +300°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMagnetic Properties\u003c\/td\u003e\n      \u003ctd\u003eNon-magnetic (A4 austenitic grade)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStandard Reference\u003c\/td\u003e\n      \u003ctd\u003eDIN 25201 \/ ISO equivalent wedge-locking washer\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMaterial Standard\u003c\/td\u003e\n      \u003ctd\u003eISO 3506 – A4 (SUS316)\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eHow Dual Lock Washers Work\u003c\/h2\u003e\n\u003cp\u003eEach FULLERKREG Dual Lock Washer set consists of two identical washers with \u003cstrong\u003eradial teeth on the outer face\u003c\/strong\u003e and \u003cstrong\u003ewedge-shaped cams on the inner face\u003c\/strong\u003e. When installed in pairs (cam-face to cam-face), the cam angle exceeds the thread pitch angle — mechanically preventing any rotational loosening under vibration, shock, or dynamic load.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e✅ Cam angle \u0026gt; thread pitch angle → self-locking under vibration\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with standard bolts and nuts — no special tools required\u003c\/li\u003e\n  \u003cli\u003e✅ Reusable — can be removed and reinstalled multiple times\u003c\/li\u003e\n  \u003cli\u003e✅ Suitable for dynamic loads, thermal cycling, and shock environments\u003c\/li\u003e\n  \u003cli\u003e✅ SUS316 A4 grade — superior resistance to chloride and acid corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDimensional Specifications\u003c\/h2\u003e\n\u003cp\u003eMaterial: \u003cstrong\u003eSUS316 (A4) Stainless Steel\u003c\/strong\u003e  |  Surface: Pickled · Passivated · Hardened  |  All dimensions in \u003cstrong\u003emm\u003c\/strong\u003e (per pair)\u003c\/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread Size\u003c\/th\u003e\n      \u003cth\u003ed1 min (mm)\u003c\/th\u003e\n      \u003cth\u003ed2 max (mm)\u003c\/th\u003e\n      \u003cth\u003eh ref (mm)\u003c\/th\u003e\n      \u003cth\u003eApprox. Pairs \/ kg\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e11.0\u003c\/td\u003e\n\u003ctd\u003e3.2\u003c\/td\u003e\n\u003ctd\u003e~1200\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e13.0\u003c\/td\u003e\n\u003ctd\u003e3.8\u003c\/td\u003e\n\u003ctd\u003e~700\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.4\u003c\/td\u003e\n\u003ctd\u003e17.0\u003c\/td\u003e\n\u003ctd\u003e4.8\u003c\/td\u003e\n\u003ctd\u003e~280\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e20.0\u003c\/td\u003e\n\u003ctd\u003e5.8\u003c\/td\u003e\n\u003ctd\u003e~150\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e12.5\u003c\/td\u003e\n\u003ctd\u003e24.0\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003ctd\u003e~80\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e14.5\u003c\/td\u003e\n\u003ctd\u003e28.0\u003c\/td\u003e\n\u003ctd\u003e7.8\u003c\/td\u003e\n\u003ctd\u003e~50\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e16.5\u003c\/td\u003e\n\u003ctd\u003e30.0\u003c\/td\u003e\n\u003ctd\u003e8.8\u003c\/td\u003e\n\u003ctd\u003e~35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e20.5\u003c\/td\u003e\n\u003ctd\u003e37.0\u003c\/td\u003e\n\u003ctd\u003e10.8\u003c\/td\u003e\n\u003ctd\u003e~18\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e24.5\u003c\/td\u003e\n\u003ctd\u003e44.0\u003c\/td\u003e\n\u003ctd\u003e12.8\u003c\/td\u003e\n\u003ctd\u003e~10\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003ed1 = inner bore diameter  |  d2 = outer diameter  |  h = total height per pair (reference value). Contact FULLERKREG for sizes outside this range or custom specifications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eSelection Guide\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eApplication Scenario\u003c\/th\u003e\n      \u003cth\u003eRecommended Size\u003c\/th\u003e\n      \u003cth\u003eKey Consideration\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMarine \/ Offshore Structures\u003c\/td\u003e\n      \u003ctd\u003eM8 – M24\u003c\/td\u003e\n      \u003ctd\u003eSUS316 A4 for maximum chloride and saltwater resistance\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eChemical Processing Equipment\u003c\/td\u003e\n      \u003ctd\u003eM6 – M20\u003c\/td\u003e\n      \u003ctd\u003ePassivated surface for acid\/alkali resistance\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFood \u0026amp; Beverage Machinery\u003c\/td\u003e\n      \u003ctd\u003eM5 – M16\u003c\/td\u003e\n      \u003ctd\u003eHygienic surface finish, non-magnetic A4 grade\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eVibrating Machinery \/ Pumps\u003c\/td\u003e\n      \u003ctd\u003eM8 – M24\u003c\/td\u003e\n      \u003ctd\u003eCam-locking prevents loosening under dynamic load\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eStructural \/ Civil Engineering\u003c\/td\u003e\n      \u003ctd\u003eM12 – M24\u003c\/td\u003e\n      \u003ctd\u003eHigh clamping force retention over time\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eElectrical \/ Instrumentation\u003c\/td\u003e\n      \u003ctd\u003eM5 – M10\u003c\/td\u003e\n      \u003ctd\u003eNon-magnetic, corrosion-free in humid environments\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePharmaceutical Equipment\u003c\/td\u003e\n      \u003ctd\u003eM5 – M16\u003c\/td\u003e\n      \u003ctd\u003e316L grade meets cleanroom and hygienic standards\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eStandard \u0026amp; Compliance\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG Dual Lock Washers are manufactured in accordance with \u003cstrong\u003eDIN 25201\u003c\/strong\u003e design principles for wedge-locking washers. The SUS316 (A4) grade meets \u003cstrong\u003eISO 3506\u003c\/strong\u003e requirements for corrosion-resistant stainless steel fasteners. All products undergo batch dimensional inspection and surface quality verification before shipment.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e📋 Design Standard: DIN 25201 (Wedge-Locking Washers)\u003c\/li\u003e\n  \u003cli\u003e📋 Material Standard: ISO 3506 – A4 (SUS316 \/ 316L)\u003c\/li\u003e\n  \u003cli\u003e📋 Surface: Pickled + Passivated + Hardened\u003c\/li\u003e\n  \u003cli\u003e📋 Inspection: Dimensional \u0026amp; visual per batch\u003c\/li\u003e\n  \u003cli\u003e📋 Packaging: Bulk bag \/ box, labeled with size, material grade, and lot number\u003c\/li\u003e\n  \u003cli\u003e📋 Mill certificates available on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eFULLERKREG Dual Lock Washers SUS316 (A4) – actual product photos\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:16px; border:1px solid #e0e0e0; vertical-align:middle; min-height:120px;\"\u003e[Photo 1]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:16px; border:1px solid #e0e0e0; vertical-align:middle; min-height:120px;\"\u003e[Photo 2]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:16px; border:1px solid #e0e0e0; vertical-align:middle; min-height:120px;\"\u003e[Photo 3]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:16px; border:1px solid #e0e0e0; vertical-align:middle; min-height:120px;\"\u003e[Photo 4]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e🏭 \u003cstrong\u003eDirect Manufacturer\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eFactory-direct pricing with full production traceability and batch records\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e🔬 \u003cstrong\u003eMaterial Certified\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eSUS316 \/ A4 with mill certificates and material test reports available on request\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e📦 \u003cstrong\u003eFlexible MOQ\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eSmall sample orders to full container loads — wholesale pricing available\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e🌍 \u003cstrong\u003eGlobal Shipping\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eWorldwide export with DDP \/ DAP \/ FOB terms available\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e⚙️ \u003cstrong\u003eCustom Specifications\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eNon-standard sizes, special coatings, and OEM packaging available on request\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e💬 \u003cstrong\u003eTechnical Support\u003c\/strong\u003e\n\u003c\/td\u003e\n      \u003ctd\u003eEngineering team available for product selection and application guidance\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cstrong\u003e📩 Request a quote or technical datasheet:\u003c\/strong\u003e Contact the FULLERKREG sales team for bulk pricing, custom specifications, and lead time confirmation.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/dual-lock-washers-sus316-a4-stainless-steel.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}