{"product_id":"button-head-4-20","title":"Button Head M4×20MM Screw – Drone Fastening Bolt for FPV, UAV \u0026 DIY Electronics","description":"\u003ch1 data-path-to-node=\"3\"\u003eButton Head M4×20MM Screw – Drone Fastening Bolt for FPV, UAV \u0026amp; DIY Electronics\u003c\/h1\u003e\n\u003cp data-path-to-node=\"4\"\u003eWhen engineering commercial-grade autonomous UAVs, professional heavy-lift cinema drones, or rugged robotics platforms, every millimeter of physical clearance and every gram of aerodynamic drag matters. Large aircraft carrying high-end camera rigs, multi-cell batteries, or thermal sensors experience high torsional twisting forces during rapid flight corrections. To secure heavy multi-plated carbon fiber frames without creating bulky, sharp obstructions, professional developers rely on the \u003cb data-path-to-node=\"4\" data-index-in-node=\"494\"\u003eButton Head M4×20MM Screw\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp data-path-to-node=\"5\"\u003eFeaturing a low-profile, dome-shaped head design and heavy-duty metric thread tracking, this high-tensile structural bolt delivers immense clamping force while maintaining a clean, streamlined surface layout across your aircraft. Whether you are binding thick carbon fiber arm reinforcements, anchoring heavy landing gear brackets, or assembling industrial-grade DIY electronics workstations, this precision-machined drone part is built to survive extreme mechanical stress.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"7\"\u003eThe Aerodynamic \u0026amp; Mechanical Advantages of 20mm Button Head Geometry\u003c\/h2\u003e\n\u003cp data-path-to-node=\"8\"\u003eIn custom drone parts and hardware engineering, standard hex cap screws often snag on field grass, battery straps, or external wiring looms due to their tall profile.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003eThe \u003cb data-path-to-node=\"9\" data-index-in-node=\"4\"\u003eM4×20MM drone fastening bolt\u003c\/b\u003e eliminates these design flaws entirely:\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eLow-Drag Dome Shape:\u003c\/b\u003e Sits flush against the chassis surface, minimizing snags on battery wires and landing paths while preserving clean aerodynamics.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eUniform Clamping Footprint:\u003c\/b\u003e Distributes pressure evenly to prevent the screw from micro-fracturing or crushing premium woven carbon fiber plates under high torque values.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eExtended 20mm Depth:\u003c\/b\u003e Provides the ideal functional depth required to span thick multi-layered frame arms, base structural plates, and heavy isolation columns safely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"12\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable data-path-to-node=\"13\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMechanical Parameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngineering Specification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,1,0,0\"\u003e\u003cb data-path-to-node=\"13,1,0,0\" data-index-in-node=\"0\"\u003eProduct Model Identifier\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,1,1,0\"\u003eButton Head Metric Screw \/ Bolt Series (M4×20)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,2,0,0\"\u003e\u003cb data-path-to-node=\"13,2,0,0\" data-index-in-node=\"0\"\u003eThread Size Standard\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,2,1,0\"\u003eM4 Precision Metric Layout (4mm Thread Width)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,3,0,0\"\u003e\u003cb data-path-to-node=\"13,3,0,0\" data-index-in-node=\"0\"\u003eFunctional Element Length\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,3,1,0\"\u003e20mm Structural Length (Excluding Screw Head)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,4,0,0\"\u003e\u003cb data-path-to-node=\"13,4,0,0\" data-index-in-node=\"0\"\u003eHead Profile Style\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,4,1,0\"\u003eLow-Profile Rounded Button Head (Hex Drive Interface)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,5,0,0\"\u003e\u003cb data-path-to-node=\"13,5,0,0\" data-index-in-node=\"0\"\u003eMaterial Strength Core\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,5,1,0\"\u003eHigh-Tensile Structural Alloy Steel Composite\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,6,0,0\"\u003e\u003cb data-path-to-node=\"13,6,0,0\" data-index-in-node=\"0\"\u003eEnvironmental Protection\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"13,6,1,0\"\u003eWeatherproof Anti-Oxidization Protective Polish\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 data-path-to-node=\"15\"\u003eIsolating Internal Electronics from Structural Harmonics\u003c\/h2\u003e\n\u003cp data-path-to-node=\"16\"\u003eLarge-scale multirotors pull hundreds of amperes through their central power systems, requiring stable internal layouts. Heavy configurations depend on a completely rigid frame to interpret sensor data correctly.\u003c\/p\u003e\n\u003cp data-path-to-node=\"17\"\u003eIf your structural frame screws are loose or flexing, raw motor vibrations will bypass your isolation grommets. This causes massive data noise on your gyro sensor chip, leading to sudden mid-air drops or unexplainable flight twitches. Securing your core structural joints with our premium M4 fasteners builds an iron-clad cage around your core systems. The unyielding clamping pressure locks your frame plates together as a single solid unit, ensuring your flight controller isolates background noise and your high-power video equipment outputs a crisp, line-free FPV feed to your ground station.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"19\"\u003eFrequently Asked Questions (FAQs)\u003c\/h2\u003e\n\u003ch3 data-path-to-node=\"20\"\u003eIs this M4 button head screw compatible with standard 5-inch racing quads?\u003c\/h3\u003e\n\u003cp data-path-to-node=\"21\"\u003eGenerally no. Standard 5-inch FPV racing and freestyle drone frames use tighter, smaller M3 hardware sets. This heavier M4×20mm size is custom-engineered for larger 7-inch to 10-inch long-range frames, commercial UAVs, or cinematic cinema-lifters.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"22\"\u003eHow is the 20mm length measured on button head screws?\u003c\/h3\u003e\n\u003cp data-path-to-node=\"23\"\u003eIn metric button head standards, the 20mm functional length is measured starting exactly from the flat underside of the dome head down to the very tip of the threaded shaft. The rounded head thickness itself is never included in the length calculation.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"25\"\u003eFortify Your Fleet with Professional Streamlined Hardware\u003c\/h2\u003e\n\u003cp data-path-to-node=\"26\"\u003eDo not let structural frame play or a stripped thread put your high-end tracking processors or expensive camera payloads at risk. The \u003cb data-path-to-node=\"26\" data-index-in-node=\"134\"\u003eButton Head M4×20MM Screw – Drone Fastening Bolt for FPV, UAV \u0026amp; DIY Electronics\u003c\/b\u003e offers the industrial-grade tensile strength, precise metric thread pitches, and low-drag aerodynamic profile needed to endure grueling commercial environments and high-velocity flight maneuvers. Eliminate structural weaknesses, prevent battery strap wear, and assemble your high-load airframe components with total mechanical confidence.\u003c\/p\u003e\n\u003cp data-path-to-node=\"27\"\u003eAdd this premium M4×20MM button head screw kit to your cart today, stock up your workbench drone parts repository drawer, and build your next massive hardware layout to the highest engineering standards!\u003c\/p\u003e","brand":"Droneyards","offers":[{"title":"Default Title","offer_id":54630112362868,"sku":"FY_Screw_Button Head 4*20\/009","price":7.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/6477\/2212\/files\/download_4_e53f9a92-7612-457d-8230-a5635142f35e.avif?v=1779263604","url":"https:\/\/www.fpvyards.in\/products\/button-head-4-20","provider":"FPV Yards","version":"1.0","type":"link"}