Titanium Countersunk Socket Head Screws M2 & M3 — Flush-Mount Fasteners That Cut Weight Without Cutting Strength When every gram counts — whether you're building a competition RC car, tuning a road bike, assembling a drone frame, or finishing a precision instrument — switching from steel to titanium fasteners is one of the most effective weight-reduction upgrades available. These M2 and M3 titanium countersunk socket head screws deliver the flush-mount profile of a flat-head design with the torque-transfer efficiency of an internal hex drive, all in a fastener that weighs roughly 45% less than an equivalent steel screw. Engineers, hobbyists, and performance builders who refuse to compromise on either weight or reliability will find these screws a direct upgrade over standard alloy steel countersunk fasteners. Each pack contains your chosen quantity (10, 20, 30, 50, 80, or 100 pieces) of the same size. Thread diameters are M2 and M3; total lengths (including the head) range from 4mm (≈5/32") to 16mm (≈5/8"). The 90° countersunk head profile allows the head to sit flush with or below the mating surface when installed in a properly countersunk hole. The material is titanium alloy, which provides a tensile strength generally comparable to mid-grade alloy steel while offering inherent corrosion resistance without additional surface treatment. Common applications include flush-mounting body panels and battery trays on RC vehicles and drones, securing carbon fiber frame sections on road and mountain bikes, fastening aluminum enclosures for electronics and precision instruments, and replacing corroded or heavy steel screws in marine hardware and outdoor equipment. The internal hex (Allen) drive resists cam-out under high torque, making these titanium flat head machine screws a reliable choice wherever repeated assembly and disassembly is expected. 🔩 Compatibility: ISO metric coarse thread. M2 (0.4mm pitch) and M3 (0.5mm pitch). Fits standard metric tapped holes. Hex key required: M2 → 1.5mm Allen wrench | M3 → 2mm Allen wrench. Note: listed length includes the head. ⚠️ Torque Note: Titanium is more susceptible to socket rounding than steel. Always use a correctly sized, well-fitting hex key and a calibrated torque wrench. Do not overtighten. Contact us to confirm suitability for your specific load requirements. ✅ Key Features of These Titanium Countersunk Socket Head Screws ⚖️~45% Lighter Than Steel — Titanium alloy delivers a strength-to-weight ratio that makes these screws a go-to choice for weight-sensitive builds. Switching from steel to titanium countersunk screws on an RC vehicle or bicycle can meaningfully reduce rotating and unsprung mass without sacrificing clamping force. 🛡️Inherent Corrosion Resistance — Titanium forms a stable oxide layer that resists saltwater, humidity, and mild acids without any additional coating. These titanium flat head machine screws are a practical choice for marine hardware, outdoor electronics enclosures, and cycling components exposed to rain and road spray. 📐90° Countersunk Flat Head Profile — The head sits flush with or below the mating surface when installed in a properly countersunk hole, eliminating snag points on body panels, frame rails, and carbon fiber sheets. Ideal for aerodynamic surfaces and tight-clearance assemblies. 🔑Internal Hex (Allen) Drive — The socket drive resists cam-out and allows high torque application in confined spaces where a Phillips driver would slip. Works with standard metric hex keys (1.5mm for M2, 2mm for M3) available at any hardware or hobby store. 🔬Low Galvanic Corrosion with Aluminum — Titanium and aluminum have a low galvanic potential difference, making these screws a technically sound choice for aluminum frames, CNC-machined parts, and anodized components where dissimilar-metal corrosion is a concern with steel fasteners. 📦Flexible Pack Quantities — Available in 10, 20, 30, 50, 80, and 100-piece packs. Buy 10 pcs for a single build or 100 pcs for workshop restocking — the per-unit cost decreases with larger quantities, making bulk purchasing cost-effective for RC builders, bike mechanics, and small-batch manufacturers. 📐 Technical Specifications — Titanium Countersunk Socket Head Screws Product Type Countersunk (Flat Head) Socket Head Cap Screw Drive Type Internal Hex (Allen / Socket) Head Angle 90° Material Titanium Alloy Tensile Strength Typically ~900–1000 MPa (varies by alloy grade — contact us to confirm) Weight vs. Steel Approximately 45% lighter than equivalent alloy steel screws Corrosion Resistance Inherently corrosion-resistant (no additional coating required) Thread Standard ISO Metric Coarse Available Thread Diameters M2, M3 Thread Pitch M2: 0.4mm | M3: 0.5mm Available Lengths (incl. head) M2: 4mm (≈5/32"), 5mm (≈3/16"), 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈1/2") — M3: 6mm (≈1/4"), 8mm (≈5/16"), 10mm (≈3/8"), 12mm (≈1/2"), 16mm (≈5/8") Hex Key Size M2: 1.5mm | M3: 2mm Surface Finish See variant options Pack Quantities 10 / 20 / 30 / 50 / 80 / 100 pieces Country of Origin See variant options ❓ Frequently Asked Questions How do I choose the right length for a titanium countersunk screw? Note that the listed length includes the head. Measure the total thickness of the material you are fastening. For a flush finish, the screw length should equal the material thickness so the head sits level with the surface. For example, a 6mm (≈1/4") thick panel typically calls for an M2x6 or M3x6 screw. When in doubt, choose the next length up and countersink slightly deeper. If threading into a blind hole, leave at least 1–1.5× the thread diameter of clearance at the bottom. How strong are titanium alloy screws compared to steel? Titanium alloy fasteners generally offer a tensile strength comparable to mid-grade alloy steel — typically in the range of 900–1000 MPa for Grade 5 / Ti-6Al-4V alloy — while weighing approximately 45% less. This makes them well-suited for weight-sensitive applications such as RC vehicles, drones, bicycle components, and precision instruments where reducing rotating or unsprung mass matters. Contact us to confirm the specific alloy grade and mechanical properties for your application. Are titanium screws suitable for outdoor or corrosive environments? Yes. Titanium alloy is inherently corrosion-resistant due to a stable oxide layer that forms on its surface. It generally performs well in saltwater, humid, and mildly acidic environments without additional coating. This makes these titanium countersunk screws a practical choice for marine hardware, outdoor electronics enclosures, and cycling components exposed to rain and road spray. For highly aggressive chemical environments, contact us to confirm suitability. What thread standard do these screws follow, and are they compatible with standard metric hardware? These screws follow the ISO metric coarse thread standard. M2 uses a 0.4mm pitch and M3 uses a 0.5mm pitch. They are compatible with standard metric tapped holes, threaded inserts, and metric nuts of the same diameter and pitch. They are not compatible with UNC/UNF (inch) threads. What hex key size do I need for M2 and M3 titanium countersunk screws? M2 countersunk socket head screws typically require a 1.5mm hex key (Allen wrench). M3 countersunk socket head screws typically require a 2mm hex key. Always do a test fit before applying full torque to confirm the key seats fully in the socket without play. Titanium is more susceptible to socket rounding than steel if an ill-fitting key is used, so use a quality hex key set. Can I use these titanium screws in aluminum, carbon fiber, or plastic parts? Yes. Titanium and aluminum have a low galvanic corrosion potential relative to each other, making titanium screws a technically sound choice for aluminum frames and enclosures. They are also widely used in carbon fiber composite panels and rigid plastic assemblies. Use a calibrated torque wrench and follow the recommended torque specification for the thread size to avoid stripping the tapped hole, especially in softer materials. For plastic, consider using a threaded insert for best results. How do I decide between 10, 20, 30, 50, 80, or 100 pieces? For a single repair or prototype build, 10 or 20 pcs is generally sufficient. Workshop restocking or small production runs typically call for 30–50 pcs. For ongoing manufacturing, RC builds, or bicycle workshop use, 80 or 100 pcs offers a lower per-unit cost and reduces reorder frequency. All quantities ship in the same secure packaging from our US warehouse. 🛒 Select your thread diameter x length and quantity above, then add to cart — ships from our US warehouse.
