{"title":"DIN 915 \/ ISO 4028 Socket Set Screw with Dog Point A4 Stainless","description":"\u003ch2\u003eDIN 915 \/ ISO 4028 — Socket Set Screw with Dog Point | A4 Marine Stainless Steel | Bright Passivated\u003c\/h2\u003e\n\n\u003cp\u003eFULLERKREG DIN 915 \/ ISO 4028 socket set screws (grub screws) with dog 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 precision-ground cylindrical dog point provides positive mechanical location and engagement, while the A4 grade delivers superior corrosion resistance — including resistance to chlorides, seawater, and aggressive chemical environments — making these set screws the definitive choice for precision positioning in the most demanding corrosion-resistant applications.\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 915 \/ ISO 4028\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eSocket Set Screw (Grub Screw) — Dog 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\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\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\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003eMin. 700 MPa (A4-70)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003eMax. 220 HV (Vickers)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003eM3 — M20\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLength Range\u003c\/td\u003e\n\u003ctd\u003e5 mm — 60 mm (size-dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePoint Type\u003c\/td\u003e\n\u003ctd\u003eDog Point (Extended Cylindrical Pin)\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 915 \/ ISO 4028)\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread (d)\u003c\/th\u003e\n      \u003cth\u003eHex Key (s)\u003c\/th\u003e\n      \u003cth\u003eDog Point Dia. (dp) h8\u003c\/th\u003e\n      \u003cth\u003eDog Point Length (t) min.\u003c\/th\u003e\n      \u003cth\u003eCommon Lengths (l)\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\u003e1.5 mm\u003c\/td\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003ctd\u003e1.5 mm\u003c\/td\u003e\n\u003ctd\u003e5, 6, 8, 10, 12 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\u003e2.5 mm\u003c\/td\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003ctd\u003e6, 8, 10, 12, 16 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\u003e3.5 mm\u003c\/td\u003e\n\u003ctd\u003e2.5 mm\u003c\/td\u003e\n\u003ctd\u003e8, 10, 12, 16, 20 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\u003e4.0 mm\u003c\/td\u003e\n\u003ctd\u003e3.0 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\u003eM8\u003c\/td\u003e\n\u003ctd\u003e4.0 mm\u003c\/td\u003e\n\u003ctd\u003e5.5 mm\u003c\/td\u003e\n\u003ctd\u003e4.0 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\u003eM10\u003c\/td\u003e\n\u003ctd\u003e5.0 mm\u003c\/td\u003e\n\u003ctd\u003e7.0 mm\u003c\/td\u003e\n\u003ctd\u003e5.0 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\u003eM12\u003c\/td\u003e\n\u003ctd\u003e6.0 mm\u003c\/td\u003e\n\u003ctd\u003e8.5 mm\u003c\/td\u003e\n\u003ctd\u003e6.0 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\u003eM16\u003c\/td\u003e\n\u003ctd\u003e8.0 mm\u003c\/td\u003e\n\u003ctd\u003e11.0 mm\u003c\/td\u003e\n\u003ctd\u003e8.0 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\u003eM20\u003c\/td\u003e\n\u003ctd\u003e10.0 mm\u003c\/td\u003e\n\u003ctd\u003e14.0 mm\u003c\/td\u003e\n\u003ctd\u003e10.0 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\u003eDog point diameter (dp) is ground to h8 tolerance per DIN 915 \/ ISO 4028 for precise hole engagement. All dimensions per DIN 915 \/ ISO 4028. Consult FULLERKREG datasheet or contact us for full tolerance tables.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDog Point — Design \u0026amp; Function\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003edog point\u003c\/strong\u003e is a precision-ground cylindrical pin extension that protrudes beyond the threaded body of the set screw. Unlike friction-only point types (flat, cup, cone), the dog point engages a matching hole or slot in the mating shaft or component, providing \u003cstrong\u003epositive mechanical location\u003c\/strong\u003e independent of clamping force alone.\u003c\/p\u003e\n\n\u003ch3\u003eKey Functional Advantages\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositive axial location\u003c\/strong\u003e — the dog point engages a drilled hole in the shaft, preventing axial movement regardless of vibration or load reversal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePositive rotational location\u003c\/strong\u003e — when engaged in a hole or slot, prevents shaft rotation relative to the hub without relying solely on friction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRepeatable repositioning\u003c\/strong\u003e — the set screw can be removed and reinstalled with the component returning to exactly the same position; ideal for indexed or adjustable assemblies\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo shaft damage\u003c\/strong\u003e — the cylindrical dog point engages a pre-drilled hole cleanly; no marring, indenting, or deformation of the shaft surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeyway-free design\u003c\/strong\u003e — eliminates the need for a keyway on the shaft, simplifying shaft machining and reducing stress concentrations\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSuperior corrosion-resistant engagement\u003c\/strong\u003e — A4 stainless construction ensures the dog point does not corrode or seize in the shaft hole even in chloride-rich or chemically aggressive environments, maintaining clean disassembly throughout service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDog 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\u003eHolding Mechanism\u003c\/th\u003e\n      \u003cth\u003eRepositionable\u003c\/th\u003e\n      \u003cth\u003eShaft Damage\u003c\/th\u003e\n      \u003cth\u003eBest For\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFlat Point\u003c\/td\u003e\n\u003ctd\u003eDIN 913 \/ ISO 4026\u003c\/td\u003e\n\u003ctd\u003eFriction only\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eNon-marring, frequent adjustment\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\u003eFriction + indent\u003c\/td\u003e\n\u003ctd\u003eLimited\u003c\/td\u003e\n\u003ctd\u003eCircular indent\u003c\/td\u003e\n\u003ctd\u003ePermanent locking, soft shafts\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\u003eFriction + deep indent\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eDeep indent\u003c\/td\u003e\n\u003ctd\u003ePermanent location, V-groove\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDog Point\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDIN 915 \/ ISO 4028\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFriction + positive pin engagement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eNone (pre-drilled hole)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePrecision location, indexing, keyway-free\u003c\/strong\u003e\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\u003eFriction only\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eMinimal\u003c\/td\u003e\n\u003ctd\u003eCurved surfaces, pivot points\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial — A4 Marine Stainless Steel (SUS 316)\u003c\/h2\u003e\n\n\u003ch3\u003eChemical Composition\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChromium (Cr):\u003c\/strong\u003e 16.0 – 18.0%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNickel (Ni):\u003c\/strong\u003e 10.0 – 14.0%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMolybdenum (Mo):\u003c\/strong\u003e 2.0 – 3.0% — the critical addition that defines A4 \/ 316 grade\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCarbon (C):\u003c\/strong\u003e ≤ 0.08%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManganese (Mn):\u003c\/strong\u003e ≤ 2.0%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSilicon (Si):\u003c\/strong\u003e ≤ 1.0%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Austenitic stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMechanical Properties — A4-70 (per ISO 3506-3)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (Rm)\u003c\/td\u003e\n\u003ctd\u003eMin. 700 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProof Load Stress (Sp)\u003c\/td\u003e\n\u003ctd\u003eMin. 450 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003eMax. 220 HV (Vickers)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003ctd\u003eNon-magnetic (annealed state)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e−196°C to +400°C continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eA4 vs. A2 — Why Choose Marine Grade for Dog Point Applications?\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\u003eMolybdenum Content\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\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\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\u003eDog Point Seizure Risk in Chloride Environments\u003c\/td\u003e\n\u003ctd\u003eHigher — pitting can lock dog point in hole\u003c\/td\u003e\n\u003ctd\u003eLower — Mo-enhanced passive film resists pitting\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFood \/ Pharma Wash-down\u003c\/td\u003e\n\u003ctd\u003eSuitable (mild)\u003c\/td\u003e\n\u003ctd\u003ePreferred (chloride cleaning agents)\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  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eFor dog point set screws specifically, A4 is strongly preferred over A2 in any environment with chloride exposure: the dog point engages a blind hole in the shaft, creating a crevice geometry that concentrates chloride attack. A4’s molybdenum content provides critical resistance to crevice corrosion in this geometry.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSurface Finish — Bright Passivated\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProcess:\u003c\/strong\u003e Electrochemical passivation — removes free iron and surface contaminants from the stainless steel surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEffect:\u003c\/strong\u003e Restores and enhances the natural chromium oxide passive layer; for A4, the molybdenum-enhanced passive film is fully activated by passivation treatment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Bright, clean, silver finish — no coating thickness added, no dimensional change; dog point h8 tolerance is fully maintained\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompliant with:\u003c\/strong\u003e ASTM A967 \/ ISO 16048 passivation standards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo hydrogen embrittlement risk:\u003c\/strong\u003e No electroplating involved\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHygienic:\u003c\/strong\u003e Smooth, non-porous, non-contaminating surface; suitable for food, pharmaceutical, and clean-room environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\n\u003cp\u003eThe combination of A4 marine stainless steel, bright passivated finish, and dog point positive engagement makes these set screws the definitive choice for precision positioning in corrosive and demanding environments:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine \u0026amp; Offshore:\u003c\/strong\u003e Locating components in deck hardware, winches, rigging, steering systems, and offshore platform equipment exposed to seawater and salt spray; A4 prevents dog point seizure in shaft holes due to chloride-induced pitting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoastal \u0026amp; Outdoor Installations:\u003c\/strong\u003e Architectural hardware, outdoor signage structures, and mechanical assemblies in salt-air environments requiring repeatable disassembly\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical Processing:\u003c\/strong\u003e Precision location of components in pumps, valves, agitators, and reactors handling chlorides, dilute acids, and corrosive process fluids\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; Beverage Processing:\u003c\/strong\u003e Locating conveyor shafts, agitators, and filling machine components in wash-down environments using chloride-containing cleaning agents (CIP systems) where A4 is the preferred grade\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePharmaceutical \u0026amp; Medical:\u003c\/strong\u003e Precision location in sterilizable assemblies, clean-room equipment, and laboratory instruments requiring non-magnetic, non-reactive, autoclavable fasteners\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwimming Pools \u0026amp; Water Treatment:\u003c\/strong\u003e Pump and filtration system components exposed to chlorinated water where A2 would be susceptible to pitting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesalination \u0026amp; Water Treatment Plants:\u003c\/strong\u003e Equipment handling brackish water and brine streams requiring maximum chloride resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectronics \u0026amp; Precision Instrumentation:\u003c\/strong\u003e Non-magnetic location of encoder discs, sensor components, and optical assemblies in sensitive or MRI-adjacent environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eInstallation Guidelines\u003c\/h2\u003e\n\n\u003ch3\u003eShaft Hole Preparation\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDrill a hole in the shaft at the desired location to match the dog point diameter (dp) — refer to the dimension table above\u003c\/li\u003e\n  \u003cli\u003eRecommended hole tolerance: H8 (clearance fit with dog point h8) for easy engagement and removal; H7 for tighter location with minimal play\u003c\/li\u003e\n  \u003cli\u003eHole depth should be at least equal to the dog point length (t) plus 0.5 mm clearance at the bottom\u003c\/li\u003e\n  \u003cli\u003eDeburr the hole entrance to prevent galling on the dog point during engagement\u003c\/li\u003e\n  \u003cli\u003eIn marine or chemical environments, ensure the shaft hole is clean and free of corrosion products before engagement to prevent seizure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Procedure\u003c\/h3\u003e\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\u003eAlignment:\u003c\/strong\u003e Align the dog point with the shaft hole before tightening; partial engagement will damage the dog point and hole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTightening torque:\u003c\/strong\u003e Use a calibrated torque wrench — refer to the torque table below\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-galling lubrication:\u003c\/strong\u003e Apply molybdenum disulfide paste or PTFE-based lubricant to threads before installation; stainless-to-stainless assemblies are particularly susceptible to galling — lubrication is essential\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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e For vibration-prone or marine applications, apply medium-strength thread-locking adhesive to the threads before installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDo not over-torque:\u003c\/strong\u003e A4 stainless has lower hardness than alloy steel; over-torquing risks thread stripping or socket rounding\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePeriodic inspection:\u003c\/strong\u003e In severe marine or chemical environments, inspect and re-passivate or replace fasteners as part of scheduled maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eRecommended Tightening Torques (A4-70, MoS₂ Lubricated)\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\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 MoS₂-lubricated A4-70 stainless steel set screws. For dry installation, increase values by approximately 15–20%. Lubrication is strongly recommended for stainless-to-stainless assemblies to prevent galling. 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 915\u003c\/strong\u003e — Socket set screws with hexagon socket and long dog point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 4028\u003c\/strong\u003e — Hexagon socket set screws with long dog 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 915 \/ ISO 4028), Surface (Bright Passivated), 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 915 \/ ISO 4028, including dog point diameter (h8 tolerance)\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\u003eDog point concentricity and surface finish verified on sample basis per batch\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 915 and ISO 4028?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 915 and ISO 4028 are technically equivalent standards for socket set screws with long dog point. DIN 915 is the German standard; ISO 4028 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 for dog point set screws specifically?\u003c\/strong\u003e\u003cbr\u003e\nA: The dog point engages a blind hole in the shaft, creating a crevice geometry that concentrates chloride attack — the most aggressive form of stainless steel corrosion. A4 (SUS 316) contains 2–3% Molybdenum, which dramatically improves resistance to pitting and crevice corrosion in chloride environments. In marine, coastal, food processing (CIP wash-down), or chemical applications, A4 is strongly preferred to prevent the dog point from corroding and seizing in the shaft hole, which would make disassembly extremely difficult.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What hole size should I drill in the shaft for the dog point?\u003c\/strong\u003e\u003cbr\u003e\nA: The dog point is manufactured to h8 tolerance. For standard engagement, drill the shaft hole to H8 tolerance (clearance fit) for easy assembly and disassembly. For tighter location with minimal play, use H7. Refer to the dimension table above for the dog point diameter (dp) for each thread size.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can A4 stainless dog point set screws be used in seawater immersion?\u003c\/strong\u003e\u003cbr\u003e\nA: A4 (316) stainless performs well in seawater splash and spray environments and is suitable for intermittent seawater immersion. For continuous full immersion in seawater, higher-grade alloys 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: Why is lubrication especially important for A4 stainless set screws?\u003c\/strong\u003e\u003cbr\u003e\nA: Stainless steel is particularly susceptible to galling — a form of adhesive wear where threads seize and weld together during tightening. This is especially common in stainless-to-stainless assemblies. Applying an anti-galling lubricant (MoS₂ paste or PTFE compound) before installation is essential to prevent galling and ensure accurate torque application.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can A4 dog point set screws be used in food processing equipment?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, and A4 is the preferred grade for food processing environments that use chloride-containing cleaning agents (CIP systems, hypochlorite-based sanitizers). The Molybdenum content provides the additional chloride resistance needed in these wash-down conditions. The bright passivated finish provides a smooth, non-porous, non-contaminating surface suitable for food contact.\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 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\u003cp\u003e\u003cstrong\u003eQ: Are these RoHS compliant?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG A4 stainless dog point set screws are manufactured without restricted hazardous substances and are RoHS 2011\/65\/EU compliant.\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-915-iso-4028-socket-set-screw-with-dog-point-a4-stainless.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}