{"title":"DIN 913 \/ ISO 4026 Socket Set Screw with Flat Point A4 Stainless","description":"\u003ch2\u003eDIN 913 \/ ISO 4026 — Socket Set Screw with Flat Point | A4 Marine Stainless Steel\u003c\/h2\u003e\n\n\u003cp\u003eFULLERKREG DIN 913 \/ ISO 4026 socket set screws (grub screws) with flat point are manufactured to full DIN and ISO dimensional standards in \u003cstrong\u003eA4 marine-grade stainless steel (SUS 316)\u003c\/strong\u003e with a \u003cstrong\u003ebright passivated surface finish\u003c\/strong\u003e. The A4 grade provides superior corrosion resistance compared to A2, making these set screws the preferred choice for marine, coastal, chemical, and high-humidity environments where chloride exposure is a concern.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetail\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 913 \/ ISO 4026\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eSocket Set Screw (Grub Screw) — Flat Point\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eHexagon Socket (Hex Allen Key)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eA4 Marine Stainless Steel (SUS 316 \/ 1.4401)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eBright Passivated (Electrochemical Passivation)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread\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 (internal) \/ 6g (external) per ISO 965\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003eA4-70 (per ISO 3506-3)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003eM1.6 — M24\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength Range\u003c\/td\u003e\n\u003ctd\u003e2 mm — 60 mm (size-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePoint Type\u003c\/td\u003e\n\u003ctd\u003eFlat Point\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHead Type\u003c\/td\u003e\n\u003ctd\u003eFully Threaded, Headless (Grub)\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  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Dimensions (DIN 913 \/ ISO 4026)\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread (d)\u003c\/th\u003e\n      \u003cth\u003eHex Key Size (s)\u003c\/th\u003e\n      \u003cth\u003eMin. Thread Engagement\u003c\/th\u003e\n      \u003cth\u003eFlat Point Dia. (dp) approx.\u003c\/th\u003e\n      \u003cth\u003eCommon Lengths\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM1.6\u003c\/td\u003e\n\u003ctd\u003e0.7 mm\u003c\/td\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003e0.80 mm\u003c\/td\u003e\n\u003ctd\u003e2, 3, 4, 5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e0.9 mm\u003c\/td\u003e\n\u003ctd\u003e1.0 mm\u003c\/td\u003e\n\u003ctd\u003e1.00 mm\u003c\/td\u003e\n\u003ctd\u003e2, 3, 4, 5, 6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e1.3 mm\u003c\/td\u003e\n\u003ctd\u003e1.25 mm\u003c\/td\u003e\n\u003ctd\u003e1.50 mm\u003c\/td\u003e\n\u003ctd\u003e3, 4, 5, 6, 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e1.5 mm\u003c\/td\u003e\n\u003ctd\u003e1.5 mm\u003c\/td\u003e\n\u003ctd\u003e2.00 mm\u003c\/td\u003e\n\u003ctd\u003e3, 4, 5, 6, 8, 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003ctd\u003e2.50 mm\u003c\/td\u003e\n\u003ctd\u003e4, 5, 6, 8, 10, 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e2.5 mm\u003c\/td\u003e\n\u003ctd\u003e2.5 mm\u003c\/td\u003e\n\u003ctd\u003e3.50 mm\u003c\/td\u003e\n\u003ctd\u003e5, 6, 8, 10, 12, 16 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e3.0 mm\u003c\/td\u003e\n\u003ctd\u003e3.0 mm\u003c\/td\u003e\n\u003ctd\u003e4.00 mm\u003c\/td\u003e\n\u003ctd\u003e6, 8, 10, 12, 16, 20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e4.0 mm\u003c\/td\u003e\n\u003ctd\u003e4.0 mm\u003c\/td\u003e\n\u003ctd\u003e5.50 mm\u003c\/td\u003e\n\u003ctd\u003e8, 10, 12, 16, 20, 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e5.0 mm\u003c\/td\u003e\n\u003ctd\u003e5.0 mm\u003c\/td\u003e\n\u003ctd\u003e7.00 mm\u003c\/td\u003e\n\u003ctd\u003e10, 12, 16, 20, 25, 30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e6.0 mm\u003c\/td\u003e\n\u003ctd\u003e6.0 mm\u003c\/td\u003e\n\u003ctd\u003e8.50 mm\u003c\/td\u003e\n\u003ctd\u003e12, 16, 20, 25, 30, 40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e8.0 mm\u003c\/td\u003e\n\u003ctd\u003e8.0 mm\u003c\/td\u003e\n\u003ctd\u003e12.00 mm\u003c\/td\u003e\n\u003ctd\u003e16, 20, 25, 30, 40, 50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e10.0 mm\u003c\/td\u003e\n\u003ctd\u003e10.0 mm\u003c\/td\u003e\n\u003ctd\u003e15.00 mm\u003c\/td\u003e\n\u003ctd\u003e20, 25, 30, 40, 50, 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e12.0 mm\u003c\/td\u003e\n\u003ctd\u003e12.0 mm\u003c\/td\u003e\n\u003ctd\u003e18.00 mm\u003c\/td\u003e\n\u003ctd\u003e25, 30, 40, 50, 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eAll dimensions per DIN 913 \/ ISO 4026. Consult FULLERKREG datasheet or contact us for full tolerance tables.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Surface Finish\u003c\/h2\u003e\n\n\u003ch3\u003eA4 Marine Stainless Steel (SUS 316)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e 16–18% Chromium, 10–14% Nickel, 2–3% Molybdenum, ≤0.08% Carbon (austenitic stainless steel)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey Advantage:\u003c\/strong\u003e The addition of 2–3% Molybdenum significantly enhances resistance to pitting and crevice corrosion in chloride-containing environments — the critical differentiator over A2 (304)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e Excellent resistance to seawater, salt spray, brine, dilute acids, and most industrial chemicals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMagnetic:\u003c\/strong\u003e Non-magnetic in annealed state; may become slightly magnetic after cold working\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Suitable for −196°C to +400°C continuous service\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e Min. 700 MPa (A4-70 per ISO 3506-3)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProof Load Stress:\u003c\/strong\u003e Min. 450 MPa\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e Max. 220 HV (Vickers)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eA4 vs. A2 — Why Choose Marine Grade?\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eA2 (SUS 304)\u003c\/th\u003e\n      \u003cth\u003eA4 (SUS 316)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChromium Content\u003c\/td\u003e\n\u003ctd\u003e18%\u003c\/td\u003e\n\u003ctd\u003e16–18%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNickel Content\u003c\/td\u003e\n\u003ctd\u003e8–10%\u003c\/td\u003e\n\u003ctd\u003e10–14%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMolybdenum\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e2–3% (key differentiator)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChloride Resistance\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eSuperior\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMarine \/ Saltwater Use\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003ctd\u003eRecommended\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChemical Resistance\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePitting Resistance (PRE)\u003c\/td\u003e\n\u003ctd\u003e~18\u003c\/td\u003e\n\u003ctd\u003e~24–26\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003eA2-70\u003c\/td\u003e\n\u003ctd\u003eA4-70\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003eMin. 700 MPa\u003c\/td\u003e\n\u003ctd\u003eMin. 700 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eBright Passivated Surface Finish\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eElectrochemical passivation removes free iron and surface contaminants from the stainless steel surface\u003c\/li\u003e\n  \u003cli\u003eRestores and enhances the natural chromium oxide passive layer for maximum corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eProduces a bright, clean, silver appearance — no coating thickness added, no dimensional change\u003c\/li\u003e\n  \u003cli\u003eCompliant with ASTM A967 \/ ISO 16048 passivation standards\u003c\/li\u003e\n  \u003cli\u003eNo risk of hydrogen embrittlement (no electroplating involved)\u003c\/li\u003e\n  \u003cli\u003eParticularly important for A4 grade: passivation maximizes the effectiveness of the molybdenum-enhanced passive film\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFlat Point — Design \u0026amp; Function\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eflat point\u003c\/strong\u003e is the most versatile set screw tip geometry. It provides a broad, flat contact surface against the mating shaft or component, making it ideal for:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNon-marring clamping\u003c\/strong\u003e — does not indent or damage polished or soft shafts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequent adjustment\u003c\/strong\u003e — can be loosened and repositioned without leaving permanent marks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardened shafts\u003c\/strong\u003e — distributes clamping force over a larger area, reducing point stress\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThin-walled components\u003c\/strong\u003e — lower risk of deformation compared to cup or cone points\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking against rotation\u003c\/strong\u003e — friction-based holding when tightened against a flat on the shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFlat Point vs. Other Set Screw Point Types\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003ePoint Type\u003c\/th\u003e\n      \u003cth\u003eStandard\u003c\/th\u003e\n      \u003cth\u003eBest For\u003c\/th\u003e\n      \u003cth\u003eShaft Marking\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlat Point\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN 913 \/ ISO 4026\u003c\/td\u003e\n\u003ctd\u003eNon-marring, frequent adjustment, hardened shafts\u003c\/td\u003e\n\u003ctd\u003eNone \/ Minimal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCup Point\u003c\/td\u003e\n\u003ctd\u003eDIN 916 \/ ISO 4029\u003c\/td\u003e\n\u003ctd\u003ePermanent locking, soft shafts, high torque\u003c\/td\u003e\n\u003ctd\u003eCircular indent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCone Point\u003c\/td\u003e\n\u003ctd\u003eDIN 914 \/ ISO 4027\u003c\/td\u003e\n\u003ctd\u003ePermanent location, V-groove shafts\u003c\/td\u003e\n\u003ctd\u003eDeep indent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDog Point\u003c\/td\u003e\n\u003ctd\u003eDIN 915 \/ ISO 4028\u003c\/td\u003e\n\u003ctd\u003ePrecise location, keyway-free shafts\u003c\/td\u003e\n\u003ctd\u003eNone (pin engagement)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOval Point\u003c\/td\u003e\n\u003ctd\u003eISO 4026 variant\u003c\/td\u003e\n\u003ctd\u003eCurved surfaces, pivot points\u003c\/td\u003e\n\u003ctd\u003eMinimal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\n\u003cp\u003eThe combination of A4 marine stainless steel and flat point geometry makes these set screws particularly suited for demanding environments:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine \u0026amp; Offshore:\u003c\/strong\u003e Boat fittings, deck hardware, rigging components, underwater equipment, and offshore platforms exposed to seawater and salt spray\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoastal \u0026amp; Outdoor Installations:\u003c\/strong\u003e Architectural hardware, outdoor signage, and structural components in high-humidity or salt-air environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical Processing:\u003c\/strong\u003e Equipment handling dilute acids, chlorides, and corrosive process fluids where A2 would be insufficient\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; Beverage:\u003c\/strong\u003e Processing machinery, conveyors, and filling equipment requiring hygienic, corrosion-resistant fasteners (A4 preferred over A2 for wash-down environments)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePharmaceutical \u0026amp; Medical:\u003c\/strong\u003e Clean-room equipment and sterilizable assemblies requiring non-reactive, non-magnetic fasteners\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwimming Pools \u0026amp; Water Treatment:\u003c\/strong\u003e Pump housings, filtration systems, and pool hardware exposed to chlorinated water\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronics \u0026amp; Instrumentation:\u003c\/strong\u003e Non-magnetic assemblies in sensitive measurement or imaging equipment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGeneral Machinery:\u003c\/strong\u003e Securing pulleys, gears, cams, and collars to shafts where corrosion resistance is required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eInstallation Guidelines\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread engagement:\u003c\/strong\u003e Minimum engagement length = 1× nominal diameter (e.g., M6 requires min. 6 mm engagement)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTightening torque:\u003c\/strong\u003e Use a calibrated torque wrench; refer to ISO 898-1 \/ ISO 3506 torque tables for A4-70\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Apply anti-galling compound (e.g., molybdenum disulfide paste or PTFE-based lubricant) to prevent thread galling — especially important for stainless-to-stainless assemblies\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex key:\u003c\/strong\u003e Use the correct size hex key (Allen key) — see dimension table above; worn keys risk cam-out and socket damage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft flat:\u003c\/strong\u003e For maximum holding power, machine a flat on the shaft at the set screw contact point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e For vibration-prone applications, use thread-locking adhesive (medium strength) or nylon patch set screws\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDo not over-torque:\u003c\/strong\u003e Stainless steel has lower hardness than alloy steel; over-torquing risks thread stripping or socket rounding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDissimilar metals:\u003c\/strong\u003e When fastening into aluminum or other dissimilar metals in marine environments, consider using an anti-corrosion barrier compound to prevent galvanic corrosion\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eRecommended Tightening Torques (A4-70, Dry)\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eThread\u003c\/th\u003e\n\u003cth\u003eTorque (N·m) — Reference\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e0.08 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e0.17 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.30 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.70 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e1.40 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e2.40 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e5.80 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e11.5 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e20.0 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e49.0 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e96.0 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eReference values for dry, unlubricated A4-70 stainless. Reduce by 15–20% when using lubricant or anti-galling compound. Always verify with your engineering team for safety-critical applications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eStandards \u0026amp; Compliance\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 913\u003c\/strong\u003e — Socket set screws with hexagon socket and flat point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 4026\u003c\/strong\u003e — Hexagon socket set screws with flat point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 3506-3\u003c\/strong\u003e — Mechanical properties of corrosion-resistant stainless steel fasteners (set screws); A4-70 property class\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 267-11\u003c\/strong\u003e — Technical delivery conditions for fasteners; stainless steel property classes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 965-1\u003c\/strong\u003e — Metric screw thread tolerances\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eASTM A967 \/ ISO 16048\u003c\/strong\u003e — Passivation of stainless steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoHS 2011\/65\/EU\u003c\/strong\u003e — Restriction of hazardous substances compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Ordering\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAvailable in standard retail packs, engineering bulk packs, and full-box quantities\u003c\/li\u003e\n  \u003cli\u003eCustom quantity packaging available for OEM and wholesale customers\u003c\/li\u003e\n  \u003cli\u003eEach pack labeled with: Part number, Thread size × Length, Material (A4), Standard (DIN 913 \/ ISO 4026), Quantity\u003c\/li\u003e\n  \u003cli\u003eBulk orders: contact FULLERKREG for volume pricing and lead times\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e100% dimensional inspection on critical sizes per DIN 913 \/ ISO 4026\u003c\/li\u003e\n  \u003cli\u003eMaterial certification (Mill Test Certificate) available on request — confirms A4 \/ SUS 316 composition including Molybdenum content\u003c\/li\u003e\n  \u003cli\u003eHardness and tensile testing per ISO 3506-3 batch requirements\u003c\/li\u003e\n  \u003cli\u003eThread gauge inspection (Go\/No-Go) per ISO 965\u003c\/li\u003e\n  \u003cli\u003eSalt spray corrosion testing available for qualification batches\u003c\/li\u003e\n  \u003cli\u003eTraceability: heat number and batch records maintained\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 the difference between DIN 913 and ISO 4026?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 913 and ISO 4026 are technically equivalent standards for socket set screws with flat point. DIN 913 is the German standard; ISO 4026 is the international equivalent. Dimensions and tolerances are identical — parts are fully interchangeable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why choose A4 over A2 stainless steel?\u003c\/strong\u003e\u003cbr\u003e\nA: A4 (SUS 316) contains 2–3% Molybdenum, which is not present in A2 (SUS 304). This addition dramatically improves resistance to pitting and crevice corrosion in chloride environments such as seawater, salt spray, swimming pools, and chemical processing. For any application involving chloride exposure, A4 is the correct choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can A4 stainless set screws be used in seawater immersion?\u003c\/strong\u003e\u003cbr\u003e\nA: A4 (316) stainless steel performs well in seawater splash and spray environments and is suitable for intermittent seawater immersion. For continuous full immersion in seawater, higher-grade alloys (e.g., duplex stainless or super-austenitic grades) may be required depending on temperature and chloride concentration. Contact FULLERKREG for guidance on extreme marine applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will the flat point damage my shaft?\u003c\/strong\u003e\u003cbr\u003e\nA: The flat point is specifically designed to minimize shaft damage. It distributes clamping force over a broad area rather than concentrating it at a point. For polished or precision shafts, the flat point is the recommended choice.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What hex key (Allen key) size do I need?\u003c\/strong\u003e\u003cbr\u003e\nA: Refer to the dimension table above. Examples: M3 requires a 1.5 mm hex key; M6 requires a 3.0 mm hex key; M10 requires a 5.0 mm hex key.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I prevent galling when installing stainless set screws?\u003c\/strong\u003e\u003cbr\u003e\nA: Apply a small amount of anti-galling lubricant (molybdenum disulfide paste or PTFE-based compound) to the threads before installation. Avoid over-torquing and use a calibrated torque wrench. Galling is a particular risk with stainless-to-stainless assemblies and should always be mitigated with lubrication.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are these RoHS compliant?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG A4 stainless set screws are manufactured without restricted hazardous substances and are RoHS 2011\/65\/EU compliant.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How can I verify the material is genuine A4 \/ SUS 316?\u003c\/strong\u003e\u003cbr\u003e\nA: FULLERKREG provides Mill Test Certificates (MTC) on request, confirming the chemical composition including Molybdenum content. This is the standard method for verifying A4 \/ 316 grade in engineering and procurement.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cem\u003eFULLERKREG — Precision Fasteners to DIN \/ ISO Standards. For technical support, custom sizes, or bulk quotations, please contact our engineering team.\u003c\/em\u003e\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-913-iso-4026-socket-set-screw-with-flat-point-a4-stainless.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}