{"title":"M4 Titanium Bolt","description":"\u003cp\u003eM4 titanium bolts CNC-machined from Grade 5 Ti-6Al-4V (TC4) titanium alloy, delivering ~40% weight reduction over steel fasteners with superior fatigue and atmospheric corrosion resistance.\u003c\/p\u003e\n\u003cp\u003eThis is our smallest metric thread size, engineered for motorcycle master cylinder reservoir pump covers, aerodynamic fairing panels, cable guides, bicycle derailleur limit screws, and lightweight brackets. Features precision rolled M4 × 0.7mm pitch threads with a 7.5mm flanged Torx head driven by a T20 bit to spread clamping load evenly across delicate alloy or composite components.\u003c\/p\u003e\n\u003cp\u003eEach bolt weighs approximately 1–2g, available in raw natural titanium and PVD vacuum-coated finishes (PVD gold, burn blue, rainbow, and DLC black). Consult our \u003ca href=\"\/ja-jp\/blogs\/technical-resources\/fastener-metrology-how-to-measure-bolt-length-diameter-thread-pitch\"\u003eFastener Metrology Guide\u003c\/a\u003e for exact shank sizing. Prices are per bolt.\u003c\/p\u003e","products":[{"product_id":"titanium-bolt-m4x6-8-10-12-15-20-25-30-35-40mm-flange-torx-head-upper-pump-cover-screw-for-bicycle-and-motorcycle-pitch-0-7mm-by-tianswer","title":"Titanium bolt M4x6 8 10 12 15 20 25 30 35 40mm Flange Torx Head Upper pump cover Screw for Bicycle and Motorcycle, Pitch 0.7mm, by Tianswer","description":"\u003cp\u003e\u003cstrong\u003ePrecision CNC-machined Aerospace Ti-6Al-4V Grade 5 titanium M4 flanged Torx T20 screws engineered specifically for motorcycle master cylinder reservoir caps, hydraulic brake pump covers, bicycle derailleur limit screws, and lightweight electronics mounts.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eTorx T20 Drive: Zero Cam-Out \u0026amp; Anti-Strip Engineering\u003c\/h3\u003e\n\u003cp\u003eOEM hydraulic brake and clutch reservoir covers notoriously rely on soft steel Phillips (#1\/#2 JIS) or small 2.5mm internal hex fasteners. Combined with corrosive brake fluid exposure, factory screws frequently round off, seize, or strip during routine fluid flushes. Our M4 bolts feature a precision-machined 6-lobe Torx T20 internal drive that eliminates cam-out force, ensuring 100% radial torque transfer and effortless removal season after season.\u003c\/p\u003e\n\n\u003ch3\u003eIntegrated Flange Head: Leak-Free Uniform Clamping\u003c\/h3\u003e\n\u003cp\u003eEquipped with a low-profile 7.5mm diameter flanged base and 4.0mm head height, the integrated flange acts as a captive washer. It distributes clamping load uniformly across rubber diaphragm seals and aluminum reservoir caps without digging into or distorting delicate perimeter surfaces, ensuring a leak-proof hydraulic seal against vibration.\u003c\/p\u003e\n\n\u003ch3\u003eImpervious to DOT 3, DOT 4, \u0026amp; DOT 5.1 Brake Fluid\u003c\/h3\u003e\n\u003cp\u003eGlycol-ether and silicone-based hydraulic fluids rapidly deteriorate zinc coatings and induce galvanic corrosion between factory steel screws and cast aluminum master cylinders. Certified Grade 5 (Ti-6Al-4V) titanium forms a permanent passive titanium dioxide ceramic layer, rendering it completely impervious to brake fluid weeping, road salt, and harsh weather.\u003c\/p\u003e\n\n\u003ch3\u003eKey Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMotorcycles \u0026amp; Scooters:\u003c\/strong\u003e Front \u0026amp; rear master cylinder reservoir top covers (Brembo, Nissin, Magura, Formula), handlebar throttle clamp housings, and bar-end mirror hardware.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoad, Gravel \u0026amp; Mountain Bikes:\u003c\/strong\u003e Rear \u0026amp; front derailleur high\/low (H\/L) limit screws, shifter bar clamps, water bottle cage mounts, and computer\/GPS mount brackets.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRC Models \u0026amp; FPV Drones:\u003c\/strong\u003e Motor mounts, carbon fiber top plates, and camera gimbal brackets demanding high vibration resistance and minimum weight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications \u0026amp; Dimensions\u003c\/h3\u003e\n\u003cp\u003e\n  \u003cstrong\u003eMaterial:\u003c\/strong\u003e Certified Aerospace Ti-6Al-4V (TC4) Titanium Alloy, Grade 5\u003cbr\u003e\n  \u003cstrong\u003eThread Diameter:\u003c\/strong\u003e M4\u003cbr\u003e\n  \u003cstrong\u003eThread Pitch:\u003c\/strong\u003e 0.7mm (Standard Metric Coarse)\u003cbr\u003e\n  \u003cstrong\u003eDrive Type:\u003c\/strong\u003e Torx T20 6-Lobe Star Drive\u003cbr\u003e\n  \u003cstrong\u003eHead Style:\u003c\/strong\u003e Integrated Flanged Button Head\u003cbr\u003e\n  \u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 7.5mm\u003cbr\u003e\n  \u003cstrong\u003eHead Height:\u003c\/strong\u003e 4.0mm\u003cbr\u003e\n  \u003cstrong\u003eWeight:\u003c\/strong\u003e ~1.0–2.0g per piece (approx. 45% lighter than OEM steel fasteners)\u003cbr\u003e\n  \u003cstrong\u003eAvailable Lengths:\u003c\/strong\u003e 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm\u003cbr\u003e\n  \u003cstrong\u003eAvailable Finishes:\u003c\/strong\u003e Natural Titanium, PVD Vacuum-Coated Gold, Rainbow, Burn Blue, PVD Deep Black\n\u003c\/p\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Torque Guidelines\u003c\/h3\u003e\n\u003cp\u003eFor master cylinder reservoir covers and carbon bicycle components, hand-tighten evenly across diagonal screws to a modest 1.5–2.0 N·m (13–18 in-lb) to avoid pinching the rubber gasket. For structural M4 mechanical applications, torque up to 3.0 N·m (26 in-lb). Applying a tiny dab of anti-seize paste or synthetic grease ensures smooth, gall-free service. To learn more about preventing stripped screw heads and why Torx outperforms conventional drives, read our \u003ca href='\\\"\/blogs\/technical-resources\/why-do-titanium-screws-strip-the-reddit-approved-guide-to-preventing-ti-6al-4v-bolt-failure\\\"'\u003eGuide to Preventing Titanium Fastener Stripping and Failure\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePrice is for 1 bolt.\u003c\/em\u003e\u003c\/p\u003e","brand":"Tianswer","offers":[{"title":"Rainbow \/ M4x6mm","offer_id":46190172045569,"sku":"TS-M4-FTX20-6-RB","price":2.04,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M4x8mm","offer_id":46190172078337,"sku":"TS-M4-FTX20-8-RB","price":2.16,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ M4x10mm","offer_id":46190172111105,"sku":"TS-M4-FTX20-10-RB","price":2.27,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 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