{"title":"DIN 436 Square Washer for Wood Construction – HDG","description":"\u003ch1\u003eDIN 436 Square Washer for Wood Construction — Low Carbon Steel, Hot-Dip Galvanized (HDG)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 436 square flat washers are manufactured to DIN 436 standard in low carbon steel with hot-dip galvanizing (HDG) per ISO 1461. DIN 436 square washers feature a large square external shape providing a significantly larger bearing area than conventional round washers — essential for wood construction, timber framing, and seismic applications where pull-through resistance is critical. Hot-dip galvanizing provides a thick, metallurgically bonded zinc coating (45–85 μm) with excellent long-term corrosion protection for outdoor structural applications — the industry-standard surface treatment for heavy-duty timber construction hardware. The HDG coating is self-healing at cut edges and scratches, providing cathodic protection to the base steel.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 436 (Square Flat Washer for Wood Construction)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Low Carbon Steel (Q235 \/ S235 equivalent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Hot-Dip Galvanizing (HDG) per ISO 1461\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eZinc Coating Thickness:\u003c\/strong\u003e 45–85 μm (metallurgically bonded)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e M10 – M52\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Square — large bearing area, prevents rotation, distributes load over wide surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCathodic protection:\u003c\/strong\u003e HDG zinc sacrificially protects base steel at cut edges and scratches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry standard\u003c\/strong\u003e for heavy-duty outdoor timber construction hardware\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRoHS \u0026amp; REACH Compliant\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Specifications — DIN 436 Square Washer, Low Carbon Steel HDG\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Per DIN 436. Note: HDG coating adds 45–85 μm per surface — allow for coating thickness in precision fits.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFor Thread\u003c\/th\u003e\n\u003cth\u003ed1 min\u003c\/th\u003e\n\u003cth\u003ed1 max\u003c\/th\u003e\n\u003cth\u003ea nom\u003c\/th\u003e\n\u003cth\u003ea min\u003c\/th\u003e\n\u003cth\u003ea max\u003c\/th\u003e\n\u003cth\u003eh nom\u003c\/th\u003e\n\u003cth\u003eh min\u003c\/th\u003e\n\u003cth\u003eh max\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e11.43\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e28.7\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e2.4\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e38.4\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e3.4\u003c\/td\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e17.5\u003c\/td\u003e\n\u003ctd\u003e18.2\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e48.4\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e3.4\u003c\/td\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e22\u003c\/td\u003e\n\u003ctd\u003e22.84\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e58.1\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e3.4\u003c\/td\u003e\n\u003ctd\u003e4.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM22\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e24.84\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e68.1\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e26\u003c\/td\u003e\n\u003ctd\u003e26.84\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e78.1\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM27\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e30.84\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003ctd\u003e87.8\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM30\u003c\/td\u003e\n\u003ctd\u003e33\u003c\/td\u003e\n\u003ctd\u003e34\u003c\/td\u003e\n\u003ctd\u003e95\u003c\/td\u003e\n\u003ctd\u003e92.8\u003c\/td\u003e\n\u003ctd\u003e95\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM33\u003c\/td\u003e\n\u003ctd\u003e36\u003c\/td\u003e\n\u003ctd\u003e37\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e97.8\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM36\u003c\/td\u003e\n\u003ctd\u003e39\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e107.8\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM39\u003c\/td\u003e\n\u003ctd\u003e42\u003c\/td\u003e\n\u003ctd\u003e43\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e117.5\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM42\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003ctd\u003e46\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e127.5\u003c\/td\u003e\n\u003ctd\u003e130\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM45\u003c\/td\u003e\n\u003ctd\u003e48\u003c\/td\u003e\n\u003ctd\u003e49\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e137.5\u003c\/td\u003e\n\u003ctd\u003e140\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003ctd\u003e52\u003c\/td\u003e\n\u003ctd\u003e53.2\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e147.5\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e6.8\u003c\/td\u003e\n\u003ctd\u003e8.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM52\u003c\/td\u003e\n\u003ctd\u003e56\u003c\/td\u003e\n\u003ctd\u003e57.2\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e157.5\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e8.8\u003c\/td\u003e\n\u003ctd\u003e11.2\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eAll dimensions in mm per DIN 436. d1 = inner hole diameter; a = square side length; h = washer thickness (before HDG). HDG adds 45–85 μm per surface.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eHDG vs. Stainless Steel — Surface Treatment Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eHDG (This Product)\u003c\/th\u003e\n\u003cth\u003eA2 Stainless (SUS304)\u003c\/th\u003e\n\u003cth\u003eA4 Stainless (SUS316)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoating type\u003c\/td\u003e\n\u003ctd\u003eHot-dip zinc (metallurgically bonded)\u003c\/td\u003e\n\u003ctd\u003ePassive oxide layer\u003c\/td\u003e\n\u003ctd\u003ePassive oxide layer + Mo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eZinc thickness\u003c\/td\u003e\n\u003ctd\u003e45–85 μm\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCathodic protection\u003c\/td\u003e\n\u003ctd\u003eYes — zinc sacrifices to protect steel\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCorrosion resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — outdoor structural\u003c\/td\u003e\n\u003ctd\u003eGood — general outdoor\u003c\/td\u003e\n\u003ctd\u003eExcellent — marine grade\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCost\u003c\/td\u003e\n\u003ctd\u003eMost economical\u003c\/td\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty outdoor timber, structural\u003c\/td\u003e\n\u003ctd\u003eGeneral outdoor, food-safe\u003c\/td\u003e\n\u003ctd\u003eMarine, coastal, seawater\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eHot-Dip Galvanizing (HDG) — Technical Details\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProcess Standard\u003c\/td\u003e\n\u003ctd\u003eISO 1461 (Hot-Dip Galvanizing)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eZinc Coating Thickness\u003c\/td\u003e\n\u003ctd\u003e45–85 μm (metallurgically bonded Fe-Zn alloy layers)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBonding mechanism\u003c\/td\u003e\n\u003ctd\u003eMetallurgical — zinc diffuses into steel surface\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCathodic protection\u003c\/td\u003e\n\u003ctd\u003eYes — zinc sacrificially protects base steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSelf-healing\u003c\/td\u003e\n\u003ctd\u003eYes — zinc oxide forms at cut edges and scratches\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eExpected service life\u003c\/td\u003e\n\u003ctd\u003e25–50+ years in typical outdoor environments\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +200°C (zinc coating stable)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS \/ REACH\u003c\/td\u003e\n\u003ctd\u003eCompliant\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDIN 436 Square Washer vs. Standard Round Washer\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDIN 436 (Square)\u003c\/th\u003e\n\u003cth\u003eStandard Round Washer (DIN 125)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eSquare\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBearing area\u003c\/td\u003e\n\u003ctd\u003eMuch larger — full square surface\u003c\/td\u003e\n\u003ctd\u003eStandard annular area\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePull-through resistance\u003c\/td\u003e\n\u003ctd\u003eHigh — ideal for timber\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRotation prevention\u003c\/td\u003e\n\u003ctd\u003eYes — square profile locks in timber grain\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrimary use\u003c\/td\u003e\n\u003ctd\u003eWood construction, timber framing, structural\u003c\/td\u003e\n\u003ctd\u003eGeneral bolted assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy timber frame construction\u003c\/strong\u003e — large square bearing area, HDG for long-term outdoor durability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutdoor wooden structures\u003c\/strong\u003e — decking, pergolas, bridges, boardwalks, retaining walls\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeismic-resistant construction\u003c\/strong\u003e — DIN 436 specifically designed for seismic applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGlulam \u0026amp; engineered timber connections\u003c\/strong\u003e — structural bolting in large-span timber structures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAgricultural buildings \u0026amp; barns\u003c\/strong\u003e — heavy timber connections, cost-effective HDG finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCivil engineering \u0026amp; infrastructure\u003c\/strong\u003e — timber bridges, noise barriers, retaining structures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlayground \u0026amp; park equipment\u003c\/strong\u003e — outdoor durability with HDG long-term protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Photo Gallery\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG DIN 436 Square Washer, Low Carbon Steel, Hot-Dip Galvanized:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 1 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 2 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 3 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;text-align:center;padding:12px\"\u003e[ Photo 4 ]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect manufacturer\u003c\/strong\u003e — factory in China, no middlemen\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN dimensional control\u003c\/strong\u003e — 100% inspection on critical dimensions\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal export experience\u003c\/strong\u003e — serving distributors in Europe, North America, Southeast Asia\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eFlexible MOQ\u003c\/strong\u003e — small trial orders and large bulk shipments both welcome\u003c\/li\u003e\n  \u003cli\u003e📋 \u003cstrong\u003eFull documentation\u003c\/strong\u003e — material certs, HDG inspection reports, RoHS declarations available\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eFast lead times\u003c\/strong\u003e — standard sizes in stock, ready to ship\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is hot-dip galvanizing (HDG)?\u003c\/strong\u003e\u003cbr\u003e\nA: Hot-dip galvanizing is a process where steel is immersed in molten zinc at approximately 450°C, forming a metallurgically bonded zinc-iron alloy coating (45–85 μm thick per ISO 1461). The zinc coating provides cathodic protection — zinc sacrificially corrodes to protect the base steel, and the coating is self-healing at cut edges and scratches.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why choose HDG over stainless steel for timber construction?\u003c\/strong\u003e\u003cbr\u003e\nA: HDG is the most cost-effective choice for heavy-duty outdoor timber construction where large quantities of M10–M52 washers are required. It provides excellent long-term corrosion protection (25–50+ years) at significantly lower cost than stainless steel. Choose stainless steel (A2 or A4) for food-safe, non-magnetic, or marine applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is DIN 436?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 436 specifies square flat washers for wood construction. The large square profile provides a much greater bearing area than standard round washers, preventing bolt head pull-through in timber and distributing load over a wider surface. Specifically designed for timber framing and seismic applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does HDG coating affect dimensions?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. HDG adds 45–85 μm per surface. For M10–M52 structural applications this is generally negligible, but should be considered for precision fits. Inner hole diameter is typically reamed after galvanizing for threaded fastener clearance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do you provide material test certificates?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Mill certificates, HDG coating thickness inspection reports, and RoHS declarations available upon request.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eFULLERKREG Fasteners\u003c\/strong\u003e — Precision DIN Standard Fasteners, Direct from Manufacturer.\u003cbr\u003e\nFor wholesale inquiries, technical questions, or custom orders, please contact our sales team.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-436-square-washer-for-wood-construction-hdg.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}