{"title":"Dual Lock Washers \u003e465HV Grade 27MnCrB5 Hardened Steel GEOMET Surface Coating","description":"\u003ch2\u003eDual Lock Washers – \u0026gt;465HV Grade 27MnCrB5 Hardened Steel | GEOMET Surface Coating\u003c\/h2\u003e\n\n\u003cp\u003eFULLERKREG Dual Lock Washers in \u003cstrong\u003e27MnCrB5 hardened steel (\u0026gt;465HV)\u003c\/strong\u003e with \u003cstrong\u003eGEOMET®-equivalent zinc-flake surface coating\u003c\/strong\u003e represent the high-performance standard for wedge-locking fasteners in heavy industrial, automotive, and structural applications. Engineered to DIN 25201 principles, each cam-faced washer pair delivers mechanical anti-loosening that intensifies under vibration and dynamic load — no adhesives, no deformation, no failure.\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\u003e27MnCrB5 Alloy Steel (Boron-Manganese-Chromium)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;465 HV (through-hardened, quenched \u0026amp; tempered)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Coating\u003c\/td\u003e\n\u003ctd\u003eGEOMET®-equivalent Zinc-Flake Coating (water-based, chromium-free)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoating Thickness\u003c\/td\u003e\n\u003ctd\u003eApprox. 8–12 μm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSalt Spray Resistance\u003c\/td\u003e\n\u003ctd\u003e≥ 720 hours (ISO 9227)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Resistance\u003c\/td\u003e\n\u003ctd\u003eUp to +150°C continuous; peak up to +200°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS \/ ELV Compliance\u003c\/td\u003e\n\u003ctd\u003eYes — chromium-free, cadmium-free, lead-free\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHydrogen Embrittlement\u003c\/td\u003e\n\u003ctd\u003eNone — no electroplating process involved\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStandard Reference\u003c\/td\u003e\n\u003ctd\u003eDIN 25201 \/ Wedge-Locking Washer Principle\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial Standard\u003c\/td\u003e\n\u003ctd\u003eEN 10083-3 (27MnCrB5)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy 27MnCrB5 + GEOMET Coating?\u003c\/h2\u003e\n\u003cp\u003eThe combination of \u003cstrong\u003eboron-alloyed manganese-chromium steel\u003c\/strong\u003e and \u003cstrong\u003ezinc-flake GEOMET coating\u003c\/strong\u003e is the industry benchmark for high-load, corrosion-resistant wedge-locking washers:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e\u0026gt;465 HV hardness\u003c\/strong\u003e — cam geometry maintains integrity under extreme clamping forces\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eGEOMET coating\u003c\/strong\u003e — superior corrosion protection without hydrogen embrittlement risk\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eChromium-free \u0026amp; RoHS compliant\u003c\/strong\u003e — meets EU ELV and REACH regulations\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eConsistent friction coefficient\u003c\/strong\u003e — predictable preload and torque behavior\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eReusable\u003c\/strong\u003e — coating survives multiple installation\/removal cycles\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eNo special tools required\u003c\/strong\u003e — compatible with standard bolts and nuts\u003c\/li\u003e\n\u003c\/ul\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. Installed cam-face to cam-face, the cam angle exceeds the thread pitch angle — mechanically preventing rotational loosening under vibration, shock, or thermal cycling. The harder the external force tries to loosen the bolt, the tighter the washer pair grips.\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✅ Radial teeth bite into mating surfaces for maximum grip\u003c\/li\u003e\n  \u003cli\u003e✅ Suitable for dynamic loads, thermal cycling, and shock environments\u003c\/li\u003e\n  \u003cli\u003e✅ Works with standard hex bolts, flange bolts, and nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDimensional Specifications\u003c\/h2\u003e\n\u003cp\u003eMaterial: \u003cstrong\u003e27MnCrB5 Hardened Steel (\u0026gt;465HV)\u003c\/strong\u003e  |  Surface: \u003cstrong\u003eGEOMET Zinc-Flake Coating\u003c\/strong\u003e  |  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~1300\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~750\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~300\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~160\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~85\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~55\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~38\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~20\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~11\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\u003eAutomotive \u0026amp; Heavy Vehicles\u003c\/td\u003e\n\u003ctd\u003eM8 – M20\u003c\/td\u003e\n\u003ctd\u003eHigh vibration, RoHS\/ELV compliant GEOMET coating\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWind Turbine Structures\u003c\/td\u003e\n\u003ctd\u003eM16 – M24\u003c\/td\u003e\n\u003ctd\u003eExtreme dynamic load, long-term corrosion protection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRailway \u0026amp; Rolling Stock\u003c\/td\u003e\n\u003ctd\u003eM12 – M24\u003c\/td\u003e\n\u003ctd\u003eShock \u0026amp; vibration resistance, EN standard compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConstruction \u0026amp; Steel Structures\u003c\/td\u003e\n\u003ctd\u003eM12 – M24\u003c\/td\u003e\n\u003ctd\u003eHigh clamping force, outdoor corrosion resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIndustrial Machinery \u0026amp; Pumps\u003c\/td\u003e\n\u003ctd\u003eM8 – M20\u003c\/td\u003e\n\u003ctd\u003eCam-locking prevents loosening under dynamic load\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMining \u0026amp; Heavy Equipment\u003c\/td\u003e\n\u003ctd\u003eM16 – M24\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;465HV hardness withstands extreme clamping forces\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGeneral Engineering\u003c\/td\u003e\n\u003ctd\u003eM5 – M16\u003c\/td\u003e\n\u003ctd\u003eCost-effective anti-loosening for standard applications\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 (27MnCrB5 \/ GEOMET) are manufactured in accordance with \u003cstrong\u003eDIN 25201\u003c\/strong\u003e design principles. The 27MnCrB5 steel meets \u003cstrong\u003eEN 10083-3\u003c\/strong\u003e alloy steel standards. GEOMET-equivalent zinc-flake coating complies with \u003cstrong\u003eISO 10683\u003c\/strong\u003e (non-electrolytically applied zinc-flake coatings) and is free of hexavalent chromium, cadmium, and lead.\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: EN 10083-3 (27MnCrB5 Alloy Steel)\u003c\/li\u003e\n  \u003cli\u003e📋 Coating Standard: ISO 10683 (Zinc-Flake, Non-Electrolytic)\u003c\/li\u003e\n  \u003cli\u003e📋 Corrosion Test: ≥ 720 h salt spray per ISO 9227\u003c\/li\u003e\n  \u003cli\u003e📋 RoHS \/ ELV \/ REACH: Compliant — Cr6+, Cd, Pb free\u003c\/li\u003e\n  \u003cli\u003e📋 Inspection: Dimensional \u0026amp; visual per batch; hardness spot-check\u003c\/li\u003e\n  \u003cli\u003e📋 Packaging: Bulk bag \/ box, labeled with size, grade, coating, and lot number\u003c\/li\u003e\n  \u003cli\u003e📋 Mill certificates \u0026amp; coating test reports 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 27MnCrB5 GEOMET – 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\u003e27MnCrB5 with EN 10083-3 mill certificates and hardness test reports on request\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e🛡️ \u003cstrong\u003eGEOMET Coating\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003eZinc-flake coating ≥720h salt spray, RoHS\/ELV compliant, no hydrogen embrittlement\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, alternative 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-465hv-grade-27mncrb5-hardened-steel-geomet-surface-coating.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}