{"title":"DIN 914 \/ ISO 4027 Socket Set Screw with Cone Point A4 Stainless","description":"\u003ch2\u003eDIN 914 \/ ISO 4027 — Socket Set Screw with Cone Point | A4 Stainless Steel (Marine Grade)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e FULLERKREG  |  \u003cstrong\u003eMaterial:\u003c\/strong\u003e A4 Stainless Steel (SUS316 \/ 1.4401)  |  \u003cstrong\u003eSurface:\u003c\/strong\u003e Passivated (Bright Finish)\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG DIN 914 \/ ISO 4027 Socket Set Screws with Cone Point in A4 Stainless Steel (SUS316) combine the maximum mechanical locking performance of the cone point geometry with the superior corrosion resistance of marine-grade stainless steel. The addition of 2.0–2.5% molybdenum to the SUS316 alloy delivers significantly enhanced resistance to chloride-induced pitting and crevice corrosion compared to standard A2 (SUS304), making these set screws the definitive choice for permanent shaft locking in marine, offshore, chemical processing, desalination, and high-salinity industrial environments.\u003c\/p\u003e\n\u003cp\u003eThe cone point — a sharp, conical tip — seats into a matching conical recess on the shaft, creating a self-centering, positive mechanical lock with exceptional resistance to rotation and axial displacement under vibration and dynamic loads. Combined with a bright passivated finish, these set screws deliver long-term reliability in the most demanding corrosive environments.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eStandards \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e DIN 914 (1987), ISO 4027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Form:\u003c\/strong\u003e ISO Metric Coarse Thread (per ISO 68-1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Tolerance:\u003c\/strong\u003e 6g (per ISO 965-1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type:\u003c\/strong\u003e Hexagon Socket (Allen \/ Hex Key)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type:\u003c\/strong\u003e Cone Point — included angle 90° (M1.6–M8) \/ 120° (M10 and above), per DIN 914\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e A4 Stainless Steel (SUS316 \/ 1.4401)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade:\u003c\/strong\u003e A4 per ISO 3506-3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Passivated — bright, clean finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Properties Standard:\u003c\/strong\u003e ISO 3506-3\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Mechanical Properties\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eA4 Stainless Steel (SUS316 \/ 1.4401)\u003c\/td\u003e\n\u003ctd\u003eISO 3506-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCr Content\u003c\/td\u003e\n\u003ctd\u003e16.5 – 18.5%\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNi Content\u003c\/td\u003e\n\u003ctd\u003e10.0 – 13.0%\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMo Content\u003c\/td\u003e\n\u003ctd\u003e2.0 – 2.5%\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin. Tensile Strength\u003c\/td\u003e\n\u003ctd\u003e700 MPa (A4-70)\u003c\/td\u003e\n\u003ctd\u003eISO 3506-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardness (typical)\u003c\/td\u003e\n\u003ctd\u003eHV 200 – 300\u003c\/td\u003e\n\u003ctd\u003eISO 3506-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Tolerance\u003c\/td\u003e\n\u003ctd\u003e6g\u003c\/td\u003e\n\u003ctd\u003eISO 965-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface\u003c\/td\u003e\n\u003ctd\u003ePassivated (Bright \/ 洗白钝化)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003ctd\u003eSlightly (work-hardened)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp.\u003c\/td\u003e\n\u003ctd\u003e-196°C to +800°C (intermittent)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy A4 (SUS316)? — The Role of Molybdenum\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitting resistance:\u003c\/strong\u003e Mo dramatically increases resistance to chloride-induced pitting — the primary failure mode of A2 in marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrevice corrosion resistance:\u003c\/strong\u003e Superior in tight joints and threaded connections where oxygen depletion creates aggressive local chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher PREN:\u003c\/strong\u003e SUS316 PREN ~24–26 vs. SUS304 ~18–20 — significant improvement in chloride tolerance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcid resistance:\u003c\/strong\u003e Better resistance to dilute H₂SO₄, H₃PO₄, and organic acids vs. A2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-term reliability:\u003c\/strong\u003e A4 maintains integrity significantly longer than A2 in marine\/chemical environments, reducing maintenance costs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCone Point Geometry — Design \u0026amp; Function\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded angle:\u003c\/strong\u003e 90° for M1.6–M8; 120° for M10 and above (per DIN 914).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent locking:\u003c\/strong\u003e Seats into a matching conical shaft recess — positive, self-centering lock resisting rotation and axial displacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum holding force:\u003c\/strong\u003e Highest axial and torsional holding force among all set screw point types when used with a matching recess.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-centering:\u003c\/strong\u003e Conical geometry ensures precise, repeatable positioning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration resistance:\u003c\/strong\u003e Excellent under dynamic, cyclic, and shock loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent installation:\u003c\/strong\u003e Creates a permanent indent in the shaft — plan position carefully before final tightening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003ePoint Type Comparison — Selection Guide\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePoint Type\u003c\/th\u003e\n\u003cth\u003eHolding Force\u003c\/th\u003e\n\u003cth\u003eShaft Damage\u003c\/th\u003e\n\u003cth\u003eRepositionable\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCone Point (DIN 914)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMaximum\u003c\/td\u003e\n\u003ctd\u003eHigh (permanent)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003ePermanent locking, precision positioning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCup Point (DIN 916)\u003c\/td\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003ctd\u003eGeneral shaft locking, vibration resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlat Point (DIN 913)\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eMinimal\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eSoft shafts, frequent adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOval Point (DIN 915)\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eMinimal\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eDelicate surfaces, adjustment screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSurface Treatment: Passivation (洗白钝化)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess:\u003c\/strong\u003e Acid passivation removes free iron, machining residues, and surface contaminants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResult:\u003c\/strong\u003e Bright, silver-white finish with reinforced Cr-Mo oxide passive layer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBenefit:\u003c\/strong\u003e Maximizes SUS316 corrosion resistance — critical in chloride environments where surface contamination initiates pitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Uniform bright metallic finish — no discoloration, no scale, no heat tint.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Range\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eThread\u003c\/th\u003e\n\u003cth\u003ePitch (mm)\u003c\/th\u003e\n\u003cth\u003eSocket s (mm)\u003c\/th\u003e\n\u003cth\u003eCone Angle\u003c\/th\u003e\n\u003cth\u003eLength Range (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003ctd\u003e3 – 16\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\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003ctd\u003e4 – 20\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\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003ctd\u003e5 – 25\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\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003ctd\u003e6 – 30\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\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e90°\u003c\/td\u003e\n\u003ctd\u003e8 – 40\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\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e120°\u003c\/td\u003e\n\u003ctd\u003e10 – 50\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\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e120°\u003c\/td\u003e\n\u003ctd\u003e12 – 60\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\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e120°\u003c\/td\u003e\n\u003ctd\u003e16 – 80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e10.0\u003c\/td\u003e\n\u003ctd\u003e120°\u003c\/td\u003e\n\u003ctd\u003e20 – 100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e12.0\u003c\/td\u003e\n\u003ctd\u003e120°\u003c\/td\u003e\n\u003ctd\u003e25 – 120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eCustom lengths and configurations available. Contact FULLERKREG for non-standard requirements.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCorrosion Resistance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent:\u003c\/strong\u003e Seawater, marine atmosphere, coastal environments, chloride solutions, brine, de-icing salts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent:\u003c\/strong\u003e Dilute H₂SO₄, H₃PO₄, acetic acid, and many organic acids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGood:\u003c\/strong\u003e Food acids, alkalis, most industrial chemicals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior to A2\u003c\/strong\u003e in all chloride-containing environments due to Mo content.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot recommended\u003c\/strong\u003e for concentrated oxidizing acids or high-temperature halide environments without engineering review.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMarine and offshore — deck hardware, rigging, winches, underwater assemblies\u003c\/li\u003e\n\u003cli\u003eCoastal and harbor infrastructure exposed to salt spray\u003c\/li\u003e\n\u003cli\u003ePermanent shaft locking in corrosive environments\u003c\/li\u003e\n\u003cli\u003eChemical processing — pumps, valves, agitators, reactors\u003c\/li\u003e\n\u003cli\u003eDesalination and water treatment equipment\u003c\/li\u003e\n\u003cli\u003eFood and beverage — washdown and CIP environments\u003c\/li\u003e\n\u003cli\u003ePharmaceutical manufacturing — sterile and high-purity environments\u003c\/li\u003e\n\u003cli\u003eSwimming pool and aquatic facility equipment\u003c\/li\u003e\n\u003cli\u003eOil \u0026amp; gas topside and subsea assemblies\u003c\/li\u003e\n\u003cli\u003ePrecision positioning with conical shaft recesses in corrosive environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eA4 vs. A2 — Comparison\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eA4 \/ SUS316 (This Product)\u003c\/th\u003e\n\u003cth\u003eA2 \/ SUS304\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrosion Resistance\u003c\/td\u003e\n\u003ctd\u003eSuperior (Mo-enhanced)\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChloride \/ Marine\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeawater Immersion\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePREN Value\u003c\/td\u003e\n\u003ctd\u003e~24–26\u003c\/td\u003e\n\u003ctd\u003e~18–20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e700 MPa (A4-70)\u003c\/td\u003e\n\u003ctd\u003e700 MPa (A2-70)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFood \/ Pharma\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppearance\u003c\/td\u003e\n\u003ctd\u003eBright silver-white\u003c\/td\u003e\n\u003ctd\u003eBright silver-white\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCost\u003c\/td\u003e\n\u003ctd\u003ePremium\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eInstallation Guidelines\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUse the correct hex key size — refer to dimensional table above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft preparation:\u003c\/strong\u003e Drill a matching conical recess (90° for M3–M8; 120° for M10+) for maximum holding force.\u003c\/li\u003e\n\u003cli\u003eClean shaft and bore thoroughly before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-galling (critical):\u003c\/strong\u003e Apply MoS₂ or nickel-based anti-seize to threads before tightening — stainless is prone to cold welding.\u003c\/li\u003e\n\u003cli\u003eTighten slowly with a calibrated torque wrench — avoid power tools.\u003c\/li\u003e\n\u003cli\u003eIf seizure begins, back off immediately, re-apply anti-seize, and retry.\u003c\/li\u003e\n\u003cli\u003eFor vibration-critical use, add stainless-compatible thread-locking compound.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanence note:\u003c\/strong\u003e Cone point creates a permanent shaft indent — plan position carefully before final tightening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% thread gauge inspection per ISO 965-1 (6g); cone angle verification per DIN 914\u003c\/li\u003e\n\u003cli\u003ePMI spectrometer analysis confirming SUS316 composition including Mo content\u003c\/li\u003e\n\u003cli\u003eVickers hardness test per ISO 3506-3\u003c\/li\u003e\n\u003cli\u003eTensile \/ proof load testing per ISO 3506-3 (A4-70)\u003c\/li\u003e\n\u003cli\u003eSalt spray test post-passivation\u003c\/li\u003e\n\u003cli\u003eSocket torque test\u003c\/li\u003e\n\u003cli\u003eFull lot traceability; mill certificates available on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Ordering\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Bulk (polybag\/carton), small box (per size), or custom OEM packaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e Unit price per piece (USD) — contact us for volume pricing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomers:\u003c\/strong\u003e B2B wholesale only — no retail \/ B2C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrders:\u003c\/strong\u003e Placed offline via email — online prices for reference only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLead Time:\u003c\/strong\u003e ~30 days DDP (small batch); FOB Shanghai for large volumes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Certificates:\u003c\/strong\u003e Available on request (SUS316 + Mo content)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom:\u003c\/strong\u003e Non-standard lengths, configurations, OEM available on request\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between DIN 914 and ISO 4027?\u003c\/strong\u003e\u003cbr\u003eA: DIN 914 is the German standard; ISO 4027 is the international equivalent. Both are dimensionally interchangeable. FULLERKREG products comply with both.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the cone angle?\u003c\/strong\u003e\u003cbr\u003eA: 90° for M1.6–M8; 120° for M10 and above (per DIN 914). Use the matching countersink angle when drilling the shaft recess.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What does A4 stainless mean?\u003c\/strong\u003e\u003cbr\u003eA: A4 = SUS316 \/ 1.4401 per ISO 3506-3 — 16–18% Cr, 10–13% Ni, 2–2.5% Mo. Molybdenum gives significantly superior chloride pitting resistance vs. A2 (SUS304).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why choose A4 over A2?\u003c\/strong\u003e\u003cbr\u003eA: In marine or high-chloride environments, A2 is susceptible to pitting at the threaded joint and cone contact area — exactly where crevice conditions are worst. A4 resists this, ensuring long-term holding force and integrity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to drill a shaft recess?\u003c\/strong\u003e\u003cbr\u003eA: For maximum holding force, yes — drill a matching conical recess. The cone point can engage a flat shaft, but holding force is reduced and shaft damage more pronounced.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is passivation (洗白钝化)?\u003c\/strong\u003e\u003cbr\u003eA: An acid treatment removing free iron and contaminants, enhancing the Cr-Mo oxide passive layer for maximum corrosion resistance and a bright finish.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Suitable for seawater immersion?\u003c\/strong\u003e\u003cbr\u003eA: A4 (SUS316) handles seawater splash and marine atmosphere excellently, and intermittent immersion well. For continuous full immersion under high stress, super-duplex grades may be needed. Contact FULLERKREG for guidance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why do stainless set screws seize during installation?\u003c\/strong\u003e\u003cbr\u003eA: Stainless work-hardens under friction, causing galling (cold welding). Always use MoS₂ or nickel anti-seize and tighten slowly with a torque wrench.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I get mill certificates?\u003c\/strong\u003e\u003cbr\u003eA: Yes — FULLERKREG provides SUS316 mill certificates including Mo content on request.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Custom lengths or pitches available?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Contact FULLERKREG with your technical requirements.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-914-iso-4027-socket-set-screw-with-cone-point-a4-stainless.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}