{"title":"Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8 Bare","description":"\u003ch1\u003eWeld Nuts (DIN 929) — 10B21 Medium-Strength Steel, ISO Class 8, Bare\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 929 hexagon weld nuts in 10B21 boron-alloyed medium-strength carbon steel at ISO Class 8 offer a cost-effective, high-performance solution for automotive, appliance, sheet-metal, and general structural weld assemblies. Manufactured to the DIN 929 standard, each nut features three symmetrically arranged welding projections on the bearing face that collapse and fuse with the base material during resistance welding, creating a flush, permanent, high-strength joint. The bare (uncoated) surface finish is the standard delivery condition for applications where post-weld painting, powder coating, e-coating, or zinc plating will be applied by the customer. ISO Class 8 provides a well-balanced combination of strength and ductility, making it the most widely specified carbon steel class for general-purpose weld nuts. Available in thread sizes M3 through M16.\u003c\/p\u003e\n\n\u003ch2\u003eDimensional Data\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in mm. Tolerances per DIN 929. Unit weight (g) is theoretical reference value for carbon steel (density 7.85 g\/cm³).\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread\u003cbr\u003ed\u003c\/th\u003e\n      \u003cth\u003ePitch\u003cbr\u003e(mm)\u003c\/th\u003e\n      \u003cth\u003eNut Height\u003cbr\u003em (h14)\u003c\/th\u003e\n      \u003cth\u003eAcross Flats\u003cbr\u003es (h13)\u003c\/th\u003e\n      \u003cth\u003eAcross Corners\u003cbr\u003ee (min)\u003c\/th\u003e\n      \u003cth\u003eSpigot Dia.\u003cbr\u003ed2 (tol d11)\u003c\/th\u003e\n      \u003cth\u003eSpigot Proj.\u003cbr\u003eh1 (tol)\u003c\/th\u003e\n      \u003cth\u003eWeld Proj.\u003cbr\u003eh2 (tol)\u003c\/th\u003e\n      \u003cth\u003eUnit Weight\u003cbr\u003e(g\/pc)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003ctd\u003e3.00\u003c\/td\u003e\n\u003ctd\u003e7.50\u003c\/td\u003e\n\u003ctd\u003e8.27\u003c\/td\u003e\n\u003ctd\u003e4.50\u003c\/td\u003e\n\u003ctd\u003e0.55 ±0.1\u003c\/td\u003e\n\u003ctd\u003e0.25 +0\/-0.1\u003c\/td\u003e\n\u003ctd\u003e~0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.7\u003c\/td\u003e\n\u003ctd\u003e3.50\u003c\/td\u003e\n\u003ctd\u003e9.00\u003c\/td\u003e\n\u003ctd\u003e9.91\u003c\/td\u003e\n\u003ctd\u003e6.00\u003c\/td\u003e\n\u003ctd\u003e0.65 ±0.1\u003c\/td\u003e\n\u003ctd\u003e0.35 +0\/-0.1\u003c\/td\u003e\n\u003ctd\u003e~1.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e11.05\u003c\/td\u003e\n\u003ctd\u003e7.00\u003c\/td\u003e\n\u003ctd\u003e0.70 ±0.1\u003c\/td\u003e\n\u003ctd\u003e0.40 +0\/-0.1\u003c\/td\u003e\n\u003ctd\u003e~2.3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e5.00\u003c\/td\u003e\n\u003ctd\u003e11.00\u003c\/td\u003e\n\u003ctd\u003e12.12\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e0.75 ±0.15\u003c\/td\u003e\n\u003ctd\u003e0.50 +0\/-0.1\u003c\/td\u003e\n\u003ctd\u003e~3.7\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e6.50\u003c\/td\u003e\n\u003ctd\u003e14.00\u003c\/td\u003e\n\u003ctd\u003e15.44\u003c\/td\u003e\n\u003ctd\u003e10.50\u003c\/td\u003e\n\u003ctd\u003e0.90 ±0.15\u003c\/td\u003e\n\u003ctd\u003e0.50 +0\/-0.15\u003c\/td\u003e\n\u003ctd\u003e~7.3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e17.00\u003c\/td\u003e\n\u003ctd\u003e18.72\u003c\/td\u003e\n\u003ctd\u003e12.50\u003c\/td\u003e\n\u003ctd\u003e1.15 ±0.2\u003c\/td\u003e\n\u003ctd\u003e0.65 +0\/-0.15\u003c\/td\u003e\n\u003ctd\u003e~13.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e1.75\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e19.00\u003c\/td\u003e\n\u003ctd\u003e20.88\u003c\/td\u003e\n\u003ctd\u003e14.80\u003c\/td\u003e\n\u003ctd\u003e1.40 ±0.2\u003c\/td\u003e\n\u003ctd\u003e0.80 +0\/-0.2\u003c\/td\u003e\n\u003ctd\u003e~21.9\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e19.00\u003c\/td\u003e\n\u003ctd\u003e20.88\u003c\/td\u003e\n\u003ctd\u003e14.80\u003c\/td\u003e\n\u003ctd\u003e1.40 ±0.2\u003c\/td\u003e\n\u003ctd\u003e1.00 +0\/-0.2\u003c\/td\u003e\n\u003ctd\u003e~24.1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e24.00\u003c\/td\u003e\n\u003ctd\u003e26.75\u003c\/td\u003e\n\u003ctd\u003e18.80\u003c\/td\u003e\n\u003ctd\u003e1.80 ±0.2\u003c\/td\u003e\n\u003ctd\u003e1.00 +0\/-0.2\u003c\/td\u003e\n\u003ctd\u003e~37.0\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* Across Corners (e) calculated from s × 1.155. Unit weights are theoretical reference values; actual weights may vary ±5%. M14 has limited availability — higher MOQ applies.\u003c\/p\u003e\n\n\u003ch2\u003eSelection Guide\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eDIN 929\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e10B21 Boron-Alloyed Medium-Strength Carbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eBare (Uncoated \/ Mill Finish)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eISO Property Class\u003c\/td\u003e\n\u003ctd\u003eClass 8 (per ISO 898-2)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eMetric coarse thread (ISO 68-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Tolerance\u003c\/td\u003e\n\u003ctd\u003e6H\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNut Height Tolerance\u003c\/td\u003e\n\u003ctd\u003eh14\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAcross Flats Tolerance\u003c\/td\u003e\n\u003ctd\u003eh13\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSpigot Diameter Tolerance\u003c\/td\u003e\n\u003ctd\u003ed11\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding Projections\u003c\/td\u003e\n\u003ctd\u003e3 projections, symmetrically arranged\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWelding Method\u003c\/td\u003e\n\u003ctd\u003eResistance spot welding\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Size Range\u003c\/td\u003e\n\u003ctd\u003eM3 – M16\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProof Load Stress\u003c\/td\u003e\n\u003ctd\u003e≥ 800 MPa (Class 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e≥ 800 MPa (Class 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e160–302 HV (Class 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n\u003ctd\u003eLow (bare steel — post-process coating recommended for corrosive environments)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTypical Post-Process\u003c\/td\u003e\n\u003ctd\u003eE-coat, powder coat, paint, zinc plating (by customer)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\u003ctd\u003eBulk bag \/ box; custom packaging available\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eStandard Notes\u003c\/h2\u003e\n\u003cp\u003eDIN 929 specifies hexagon weld nuts with three welding projections on the bearing face. The spigot (pilot) locates the nut precisely on the workpiece prior to welding. Upon resistance welding, the projections collapse and fuse with the base material, creating a flush, permanent joint. 10B21 is a boron-alloyed low-carbon steel (SAE 10B21 \/ GB 10B21 equivalent) widely used in the automotive and appliance industries for weld nuts and fasteners. At ISO Class 8, the material provides excellent weldability combined with reliable medium-high strength — the most common specification for general-purpose carbon steel weld nuts. The bare surface is the standard delivery condition for assemblies that will receive a subsequent coating process.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 929\u003c\/strong\u003e — Hexagon weld nuts, metric coarse thread\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 10B21 boron-alloyed carbon steel (SAE 10B21 equivalent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProperty Class:\u003c\/strong\u003e ISO Class 8 per ISO 898-2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e Bare \/ uncoated mill finish — no plating, no coating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e Right-hand, metric coarse, tolerance class 6H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey advantage:\u003c\/strong\u003e Best balance of strength, weldability, and cost for general-purpose weld nut applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eClass 8 vs Class 10 — Which Strength Grade to Choose?\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eISO Class 8\u003c\/th\u003e\n      \u003cth\u003eISO Class 10\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProof Load Stress\u003c\/td\u003e\n\u003ctd\u003e≥ 800 MPa\u003c\/td\u003e\n\u003ctd\u003e≥ 900 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e≥ 800 MPa\u003c\/td\u003e\n\u003ctd\u003e≥ 1040 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e160–302 HV\u003c\/td\u003e\n\u003ctd\u003e272–353 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDuctility\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003ctd\u003eLower\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeldability\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTypical Use\u003c\/td\u003e\n\u003ctd style=\"background-color:#fff8e1;\"\u003e\u003cstrong\u003eGeneral-purpose, appliance, light structural ✓\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh-load automotive BIW, heavy structural\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCost\u003c\/td\u003e\n\u003ctd\u003eLower\u003c\/td\u003e\n\u003ctd\u003eHigher\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMaterial Grade Comparison — DIN 929 Weld Nuts\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eGrade\u003c\/th\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003cth\u003eISO Class\u003c\/th\u003e\n      \u003cth\u003eTensile Strength\u003c\/th\u003e\n      \u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n      \u003cth\u003eTypical Application\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background-color:#fff8e1;\"\u003e\n\u003ctd\u003e\n\u003cstrong\u003e10B21 Bare (Class 8)\u003c\/strong\u003e ✓\u003c\/td\u003e\n\u003ctd\u003eBoron carbon steel\u003c\/td\u003e\n\u003ctd\u003eClass 8\u003c\/td\u003e\n\u003ctd\u003e≥ 800 MPa\u003c\/td\u003e\n\u003ctd\u003eLow (bare)\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose, appliance, light structural, pre-coat\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e10B21 Bare (Class 10)\u003c\/td\u003e\n\u003ctd\u003eBoron carbon steel\u003c\/td\u003e\n\u003ctd\u003eClass 10\u003c\/td\u003e\n\u003ctd\u003e≥ 1040 MPa\u003c\/td\u003e\n\u003ctd\u003eLow (bare)\u003c\/td\u003e\n\u003ctd\u003eAutomotive BIW, heavy structural\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA2 (SUS304)\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003ctd\u003eA2-70\u003c\/td\u003e\n\u003ctd\u003e≥ 700 MPa\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eGeneral industrial, indoor\/outdoor\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eA4 (SUS316)\u003c\/td\u003e\n\u003ctd\u003eMarine stainless\u003c\/td\u003e\n\u003ctd\u003eA4-70\u003c\/td\u003e\n\u003ctd\u003e≥ 700 MPa\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eMarine, chemical, food-grade\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003eDIN 929 Hex Weld Nuts — 10B21 Carbon Steel, ISO Class 8, Bare actual product photos:\u003c\/p\u003e\n\u003ctable border=\"0\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%;text-align:center;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 1 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 2 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 3 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;border:1px dashed #ccc;padding:40px 10px;color:#aaa;\"\u003e[ Photo 4 ]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eChemical Composition — 10B21 Boron-Alloyed Carbon Steel\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eGrade\u003c\/th\u003e\n\u003cth\u003eC (%)\u003c\/th\u003e\n\u003cth\u003eMn (%)\u003c\/th\u003e\n\u003cth\u003eP (%)\u003c\/th\u003e\n\u003cth\u003eS (%)\u003c\/th\u003e\n\u003cth\u003eSi (%)\u003c\/th\u003e\n\u003cth\u003eB (%)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e10B21\u003c\/td\u003e\n      \u003ctd\u003e0.18–0.23\u003c\/td\u003e\n      \u003ctd\u003e0.80–1.10\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.030\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.030\u003c\/td\u003e\n      \u003ctd\u003e0.15–0.35\u003c\/td\u003e\n      \u003ctd\u003e0.0005–0.003\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* The boron (B) micro-addition improves hardenability while maintaining excellent weldability. Equivalent to SAE 10B21 \/ GB 10B21. Same base material as Class 10; property class difference is achieved through process control.\u003c\/p\u003e\n\n\u003ch2\u003eMechanical Properties — ISO Class 8 (ISO 898-2)\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty Class\u003c\/th\u003e\n\u003cth\u003eProof Load Stress (MPa)\u003c\/th\u003e\n\u003cth\u003eTensile Strength (MPa)\u003c\/th\u003e\n\u003cth\u003eHardness (HV)\u003c\/th\u003e\n\u003cth\u003eMin. Elongation\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClass 8\u003c\/td\u003e\n\u003ctd\u003e≥ 800\u003c\/td\u003e\n\u003ctd\u003e≥ 800\u003c\/td\u003e\n\u003ctd\u003e160–302\u003c\/td\u003e\n\u003ctd\u003e≥ 12%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* Class 8 offers higher ductility (min. 12% elongation vs 9% for Class 10) and superior weldability, making it the preferred grade for general-purpose and appliance weld nut applications.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG DIN 929 Class 8 Weld Nuts?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eFactory Direct\u003c\/strong\u003e — Manufactured in-house with full process control from raw material to finished part\u003c\/li\u003e\n  \u003cli\u003e⚖️ \u003cstrong\u003eOptimal Strength-Ductility Balance\u003c\/strong\u003e — Class 8 delivers ≥800 MPa tensile strength with higher ductility than Class 10, ideal for general-purpose assemblies\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eSuperior Weldability\u003c\/strong\u003e — Lower hardness range (160–302 HV) ensures consistent, reliable resistance welding with minimal cracking risk\u003c\/li\u003e\n  \u003cli\u003e🔩 \u003cstrong\u003eMost Widely Specified Grade\u003c\/strong\u003e — ISO Class 8 is the standard specification for general-purpose carbon steel weld nuts across appliance, HVAC, and light structural industries\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN 929 Compliance\u003c\/strong\u003e — Every dimension and tolerance verified against the standard; no substitutions\u003c\/li\u003e\n  \u003cli\u003e🔬 \u003cstrong\u003eMaterial Certified\u003c\/strong\u003e — Mill test certificates (MTC) available; boron content and composition verified\u003c\/li\u003e\n  \u003cli\u003e🎨 \u003cstrong\u003eBare Finish — Post-Process Ready\u003c\/strong\u003e — Uncoated surface is ideal for e-coat, powder coat, paint, or zinc plating applied after welding\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eBulk Wholesale Supply\u003c\/strong\u003e — MOQ-friendly pricing tiers; consistent lot quality for production lines\u003c\/li\u003e\n  \u003cli\u003e🚢 \u003cstrong\u003eGlobal Export Experience\u003c\/strong\u003e — Shipped worldwide with proper export documentation and packaging\u003c\/li\u003e\n  \u003cli\u003e💬 \u003cstrong\u003eTechnical Support\u003c\/strong\u003e — Engineering team available for application guidance, custom sizes, and special requirements\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"din929-8-m5","title":"M5-0.8 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -14500 Pcs per Carton","description":"\u003cp\u003e32\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768293487,"sku":"DIN929-8-M5","price":72.5,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m6","title":"M6-1.0 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -10000 Pcs per Carton","description":"\u003cp\u003e33\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768326255,"sku":"DIN929-8-M6","price":60.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m8","title":"M8-1.25 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -4700 Pcs per Carton","description":"\u003cp\u003e34\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768359023,"sku":"DIN929-8-M8","price":51.7,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m10","title":"M10-1.5 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -2500 Pcs per Carton","description":"\u003cp\u003e35\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768391791,"sku":"DIN929-8-M10","price":50.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m12","title":"M12-1.75 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -1800 Pcs per Carton","description":"\u003cp\u003e36\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768424559,"sku":"DIN929-8-M12","price":52.2,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m14","title":"M14-2.0 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -1100 Pcs per Carton","description":"\u003cp\u003e37\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768457327,"sku":"DIN929-8-M14","price":53.9,"currency_code":"USD","in_stock":true}]},{"product_id":"din929-8-m16","title":"M16-2.0 Weld Nuts (DIN 929) - 10B21 Medium-Strength Steel - ISO Class 8-Bare -850 Pcs per Carton","description":"\u003cp\u003e38\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519768490095,"sku":"DIN929-8-M16","price":52.7,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/collections\/DIN_929_0c9a454f-a0cb-485f-bc9d-bb770c8d8312.webp?v=1770622113","url":"https:\/\/www.fullerkr.com\/collections\/din929-8.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}