{"title":"DIN 915 \/ ISO 4028 Socket Set Screw Dog Point — Alloy Steel 45H Black","description":"\u003ch2\u003eDIN 915 \/ ISO 4028 — Socket Set Screw with Dog Point | Alloy Steel 45H | Grade 12.9 | Black Oxide\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\u003ealloy steel ML40Cr\u003c\/strong\u003e, heat-treated to \u003cstrong\u003e45H property class (equivalent to Grade 12.9)\u003c\/strong\u003e, with a \u003cstrong\u003eblack oxide surface finish\u003c\/strong\u003e. The dog point — a precision-ground cylindrical extension beyond the thread — provides positive mechanical location and engagement, making these set screws the definitive choice for precision positioning, indexing, and shaft-locking applications where friction-based holding alone is insufficient.\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\u003eAlloy Steel ML40Cr (Chromium Alloy Steel)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Class\u003c\/td\u003e\n\u003ctd\u003e45H (Grade 12.9 equivalent per DIN 267-11 \/ ISO 898-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eBlack Oxide (Blackening)\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. 1220 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e39 – 51 HRC\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)\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.\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\u003eHigh holding capacity\u003c\/strong\u003e — combined with 45H \/ Grade 12.9 clamping force, the dog point provides both mechanical and friction-based retention simultaneously\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\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 — Alloy Steel ML40Cr\u003c\/h2\u003e\n\n\u003cp\u003eML40Cr is a chromium-alloyed medium-carbon steel specifically selected for high-strength fastener production. Its composition and heat treatment characteristics make it the standard material for 45H \/ Grade 12.9 set screws.\u003c\/p\u003e\n\n\u003ch3\u003eChemical Composition (ML40Cr)\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eElement\u003c\/th\u003e\n\u003cth\u003eContent (%)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCarbon (C)\u003c\/td\u003e\n\u003ctd\u003e0.37 – 0.44\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSilicon (Si)\u003c\/td\u003e\n\u003ctd\u003e0.17 – 0.37\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eManganese (Mn)\u003c\/td\u003e\n\u003ctd\u003e0.50 – 0.80\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChromium (Cr)\u003c\/td\u003e\n\u003ctd\u003e0.80 – 1.10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePhosphorus (P)\u003c\/td\u003e\n\u003ctd\u003e≤ 0.025\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSulfur (S)\u003c\/td\u003e\n\u003ctd\u003e≤ 0.025\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eMechanical Properties — 45H Property Class (Grade 12.9 Equivalent)\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\u003cth\u003eStandard\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. 1220 MPa\u003c\/td\u003e\n\u003ctd\u003eDIN 267-11 \/ ISO 898-1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProof Load Stress (Sp)\u003c\/td\u003e\n\u003ctd\u003eMin. 1100 MPa\u003c\/td\u003e\n\u003ctd\u003eDIN 267-11\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e39 – 51 HRC (385 – 530 HV)\u003c\/td\u003e\n\u003ctd\u003eDIN 267-11\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMinimum Breaking Torque\u003c\/td\u003e\n\u003ctd\u003ePer DIN 267-11 size table\u003c\/td\u003e\n\u003ctd\u003eDIN 267-11\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHeat Treatment\u003c\/td\u003e\n\u003ctd\u003eQuenched \u0026amp; Tempered\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e45H vs. Standard Property Classes\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eProperty Class\u003c\/th\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eTensile Strength\u003c\/th\u003e\n\u003cth\u003eHardness\u003c\/th\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e14H\u003c\/td\u003e\n\u003ctd\u003eCarbon steel\u003c\/td\u003e\n\u003ctd\u003eMin. 700 MPa\u003c\/td\u003e\n\u003ctd\u003e22–32 HRC\u003c\/td\u003e\n\u003ctd\u003eGeneral purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e22H\u003c\/td\u003e\n\u003ctd\u003eCarbon \/ alloy steel\u003c\/td\u003e\n\u003ctd\u003eMin. 900 MPa\u003c\/td\u003e\n\u003ctd\u003e32–39 HRC\u003c\/td\u003e\n\u003ctd\u003eMedium duty\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e45H\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAlloy steel ML40Cr\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMin. 1220 MPa\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e39–51 HRC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh-strength, heavy duty\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003e45H is the highest standard property class for set screws per DIN 267-11, equivalent to Grade 12.9 in the ISO 898-1 bolt property class system.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSurface Finish — Black Oxide\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProcess:\u003c\/strong\u003e Hot alkaline blackening — a chemical conversion coating forming a thin magnetite (Fe₃O₄) layer on the steel surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Uniform matte black finish with a professional, low-reflectance appearance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating Thickness:\u003c\/strong\u003e Typically 1–2 microns — no significant dimensional change; dog point diameter tolerance (h8) is maintained\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e Moderate — provides basic protection against light oxidation; supplemental oil or wax treatment recommended for humid environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo Hydrogen Embrittlement Risk:\u003c\/strong\u003e Black oxide does not introduce hydrogen into the steel — critical for Grade 12.9 \/ 45H fasteners where hydrogen embrittlement is a serious concern with electroplated alternatives\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdhesion:\u003c\/strong\u003e Excellent base for supplemental lubricants and thread-locking compounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Resistance:\u003c\/strong\u003e Stable up to approximately 300°C\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\n\u003cp\u003eThe dog point’s positive mechanical engagement combined with 45H \/ Grade 12.9 clamping force makes these set screws the preferred choice for precision and high-load applications:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Shaft Location:\u003c\/strong\u003e Locating gears, pulleys, sprockets, and couplings at exact axial positions on shafts using a drilled engagement hole — eliminates positional drift under load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndexing \u0026amp; Detent Mechanisms:\u003c\/strong\u003e Engaging indexing holes in rotary tables, dividing heads, and indexing fixtures for repeatable angular positioning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeyway-Free Shaft Assemblies:\u003c\/strong\u003e Replacing traditional key-and-keyway connections in applications where shaft machining complexity must be minimized\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMachine Tool \u0026amp; Tooling:\u003c\/strong\u003e Securing and locating tool holders, boring bar cartridges, and adjustable cutting tool components\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive \u0026amp; Motorsport:\u003c\/strong\u003e Locating camshaft timing components, gear selectors, and drivetrain elements requiring precise, repeatable positioning\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobotics \u0026amp; Automation:\u003c\/strong\u003e Precise location of servo motor shafts, encoder discs, and actuator components where positional accuracy is critical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJig \u0026amp; Fixture Building:\u003c\/strong\u003e Locating and locking adjustable stops, guides, and reference components in production tooling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Mechanical Assemblies:\u003c\/strong\u003e Any assembly requiring the component to be removed, repositioned, and reinstalled at the same or different indexed positions\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\u003eFor indexed applications, use a jig or dividing head to ensure hole positions are accurately located\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; for maximum holding power, 1.5× diameter is recommended\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; 45H allows significantly higher torques than standard grades\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLubrication:\u003c\/strong\u003e Apply molybdenum disulfide (MoS₂) paste or equivalent anti-galling compound to threads; ensures accurate torque-to-clamp-force conversion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex key:\u003c\/strong\u003e Use a high-quality, calibrated hex key of the correct size; worn keys risk rounding the socket at high torques\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e For high-vibration applications, apply medium-strength thread-locking adhesive to the threads before installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHydrogen embrittlement:\u003c\/strong\u003e Black oxide finish does not introduce hydrogen — safe for Grade 12.9 \/ 45H; never substitute with electroplated fasteners at this strength level without baking treatment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eRecommended Tightening Torques (45H \/ Grade 12.9, 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\u003e0.45 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e1.05 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e2.10 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e3.60 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.80 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e17.5 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e30.0 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e75.0 N·m\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e145.0 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 45H \/ Grade 12.9 alloy steel set screws. For dry installation, increase values by approximately 25–30%. 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\u003eDIN 267-11\u003c\/strong\u003e — Technical delivery conditions for fasteners — set screws; defines 45H property class (tensile strength, hardness, breaking torque)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 898-1\u003c\/strong\u003e — Mechanical properties of fasteners made of carbon steel and alloy steel; Grade 12.9 reference\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\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, toolroom, and wholesale customers\u003c\/li\u003e\n  \u003cli\u003eEach pack labeled with: Part number, Thread size × Length, Material (ML40Cr), Property Class (45H), Standard (DIN 915 \/ ISO 4028), Surface (Black Oxide), 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\u003eHardness testing per DIN 267-11 (39–51 HRC) on every production batch\u003c\/li\u003e\n  \u003cli\u003eBreaking torque testing per DIN 267-11 size requirements\u003c\/li\u003e\n  \u003cli\u003eMaterial certification available on request — confirms ML40Cr alloy steel composition\u003c\/li\u003e\n  \u003cli\u003eThread gauge inspection (Go\/No-Go) per ISO 965\u003c\/li\u003e\n  \u003cli\u003eHeat treatment records (quench \u0026amp; temper parameters) maintained for full traceability\u003c\/li\u003e\n  \u003cli\u003eBlack oxide coating uniformity inspection on each batch\u003c\/li\u003e\n  \u003cli\u003eDog point concentricity and surface finish verified on sample basis per batch\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: What is a dog point and how does it differ from a flat point?\u003c\/strong\u003e\u003cbr\u003e\nA: A dog point is a precision-ground cylindrical pin extension beyond the threaded body of the set screw. Unlike a flat point, which relies entirely on friction against the shaft surface, the dog point engages a pre-drilled hole in the shaft, providing positive mechanical location. This means the component is positively retained axially and rotationally even if the set screw loses some clamping force, and the assembly can be disassembled and reassembled to exactly the same position.\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: What does 45H mean for set screws?\u003c\/strong\u003e\u003cbr\u003e\nA: 45H is the property class designation for set screws defined in DIN 267-11. It specifies a minimum tensile strength of 1220 MPa and a hardness range of 39–51 HRC. It is the highest standard property class for set screws and is equivalent to Grade 12.9 in the ISO 898-1 bolt classification system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Why is black oxide used instead of zinc plating for Grade 12.9 set screws?\u003c\/strong\u003e\u003cbr\u003e\nA: Electroplating processes (including zinc plating) introduce hydrogen into high-strength steel, creating a risk of hydrogen embrittlement — a form of delayed brittle fracture that can cause catastrophic failure without warning. Black oxide is a chemical conversion coating that does not introduce hydrogen, making it the safe and standard surface treatment for Grade 12.9 \/ 45H fasteners, as specified in ISO 4042 and DIN 267-11.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can the dog point set screw replace a key-and-keyway connection?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, in many applications. The dog point engaging a drilled hole in the shaft provides both axial and rotational location without requiring a keyway to be machined into the shaft. This simplifies shaft manufacturing, reduces stress concentrations, and allows the connection point to be repositioned. However, for very high torque transmission applications, a key-and-keyway or spline connection may still be preferred. Consult your engineering team for load-critical applications.\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. For Grade 12.9 torques, always use a high-quality hex key to avoid rounding the socket.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I get a material test certificate (MTC)?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG provides Mill Test Certificates on request, confirming the ML40Cr alloy steel chemical composition and heat treatment property class (45H).\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-915-45h-socket-set-screw-dog-point-1.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}