{"title":"5\/16\" Titanium Bolt","description":"\u003cp\u003e\u003cstrong\u003eImperial 5\/16\"-18 UNC titanium wheel assembly bolts precision-machined from Grade 5 Ti-6Al-4V (TC4) for modular multi-piece split-rim wheels, American motorsport hubs, and custom Harley-Davidson builds.\u003c\/strong\u003e Designed for 2-piece and 3-piece wheel rebuilding where imperial hardware is required, our 5\/16\" titanium bolts feature rolled 18 TPI coarse threads delivering over 950 MPa tensile strength while shedding 45% of rotating unsprung mass. Featuring an external 14.4mm 12-point bi-hex flange driven by an 8mm 12-point socket, these bolts handle high torque without slipping.\u003c\/p\u003e\n\n\u003ch3\u003eKey 5\/16\"-18 Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size \u0026amp; Pitch:\u003c\/strong\u003e 5\/16\"-18 UNC (Coarse thread, 1.411mm pitch).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable Lengths:\u003c\/strong\u003e 1.0 inch (25.4mm) and 1.125 inch (28.58mm) under-head lengths.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Design:\u003c\/strong\u003e 14.4mm integrated bi-hex flange head driven with an 8mm 12-point socket.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e 100% immune to road salt and acidic wheel cleaners, preventing rust streaks on polished modular rim lips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Fasteners \u0026amp; Technical Guides\u003c\/h3\u003e\n\u003cp\u003eRebuilding metric wheels? View our \u003ca href=\"\/collections\/m7-titanium-bolt\"\u003eM7 BBS Wheel Bolts\u003c\/a\u003e and \u003ca href=\"\/collections\/m8-titanium-bolt\"\u003eM8 Modular Wheel Hardware\u003c\/a\u003e. Learn about torque specifications in our \u003ca href=\"\/blogs\/technical-resources\/wet-torque-vs-dry-torque-titanium-fasteners-k-factor-preload-guide\"\u003eWet vs. Dry Torque on Titanium Fasteners Whitepaper\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch4 itemprop=\"name\"\u003eAre these 5\/16\"-18 bolts for lug mounting or split-rim assembly?\u003c\/h4\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eThese are perimeter assembly bolts engineered specifically to clamp the wheel barrel, face, and lip of modular multi-piece wheels together. They are not lug bolts.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch4 itemprop=\"name\"\u003eWhat is the recommended assembly torque for 5\/16\" wheel bolts?\u003c\/h4\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eRecommended assembly torque with medium-strength threadlocker is 18–22 N·m (13–16 lb-ft). Always torque in a star\/crisscross sequence in two stages.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n    \u003ch4 itemprop=\"name\"\u003eWill these bolts corrode or stain polished aluminum wheel lips?\u003c\/h4\u003e\n    \u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n      \u003cp itemprop=\"text\"\u003eNo. Grade 5 titanium does not rust or flake like chrome-plated steel, keeping your custom wheel barrels and lips pristine.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"titanium-bolt-5-16-18-bi-hex-12point-flange-bolts-professional-wheel-hub-screws-by-tianswer","title":"Grade 5 Titanium 5\/16\"-18 12-Point Flange Wheel Hub Bolt for Motorsport","description":"\u003cp\u003e\u003cstrong\u003eAerospace-grade Ti-6Al-4V Grade 5 titanium 5\/16″-18 UNC 12-point (bi-hex) flange bolts engineered for Harley-Davidson brake rotors, American V-Twin builds, and modular motorsport drag wheels.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eImperial 5\/16″-18 UNC Architecture \u0026amp; 12-Point Flange\u003c\/h3\u003e\n\u003cp\u003ePrecision CNC-machined to exacting imperial Unified Coarse specifications (5\/16″ nominal diameter with 18 threads per inch), these high-strength fasteners feature an integrated 14.4mm diameter load-spreading flange and an aerospace 12-point (bi-hex) drive head. Driven with a standard 8mm (or 5\/16″) 12-point socket, the 12-point head offers 30-degree indexing for superior ratchet clearance in tight hub cavities while completely eliminating head rounding under high torque preloads.\u003c\/p\u003e\n\n\u003ch3\u003eUnsprung \u0026amp; Peripheral Rotating Mass Reduction\u003c\/h3\u003e\n\u003cp\u003eUpgrading from heavy OEM chrome-plated steel hardware to Grade 5 titanium slashes fastener mass by over 45%. When installed on brake rotors, drive pulleys, or modular multi-piece wheel centers, removing peripheral rotating weight directly reduces wheel gyro inertia. This results in crisper turn-in handling on heavy V-Twin motorcycles, snappier launch acceleration in drag racing, and reduced suspension oscillation over uneven pavement.\u003c\/p\u003e\n\n\u003ch3\u003eZero Corrosion vs. Flaking OEM Chrome\u003c\/h3\u003e\n\u003cp\u003eFactory steel bolts on American motorcycles and custom race wheels frequently suffer from chrome flaking, road-salt pitting, and severe rust around the hex drive. Certified Grade 5 (Ti-6Al-4V) titanium forms a permanent, self-healing oxide layer that is 100% immune to corrosion from brake dust, moisture, tire prep chemicals (such as TrackBite), and aggressive cleaners.\u003c\/p\u003e\n\n\u003ch3\u003eKey Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHarley-Davidson \u0026amp; American V-Twin:\u003c\/strong\u003e Front and rear brake disc rotor mounting bolts (Dyna, Softail, Sportster, Touring, and custom choppers utilizing 5\/16″-18 rotor mounts) and rear drive belt pulley hardware.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModular Drag Racing \u0026amp; Beadlock Wheels:\u003c\/strong\u003e 3-piece modular wheels (Weld Racing, Bogart, Billet Specialties), custom forged wheel centers, and off-road beadlock ring assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance Marine \u0026amp; Offshore:\u003c\/strong\u003e Outboard motor mounting brackets, steering brackets, and marine transmission linkages requiring corrosion-proof high-tensile hardware.\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\u003eTensile Strength:\u003c\/strong\u003e \u0026gt;950–1050 MPa (Equivalent to Grade 8 imperial steel)\u003cbr\u003e\n  \u003cstrong\u003eThread Size:\u003c\/strong\u003e 5\/16″ (approx. 7.94mm major diameter)\u003cbr\u003e\n  \u003cstrong\u003eThread Pitch \/ TPI:\u003c\/strong\u003e 18 Threads Per Inch (UNC Standard Coarse, ~1.411mm pitch)\u003cbr\u003e\n  \u003cstrong\u003eFlange Head Diameter:\u003c\/strong\u003e 14.4mm\u003cbr\u003e\n  \u003cstrong\u003eFlange Head Height:\u003c\/strong\u003e 9.3mm\u003cbr\u003e\n  \u003cstrong\u003eDrive Type:\u003c\/strong\u003e 8mm (or 5\/16″) 12-Point \/ Bi-Hex Socket\u003cbr\u003e\n  \u003cstrong\u003eAvailable Lengths:\u003c\/strong\u003e 1.00″ (25.4mm) and 1.125″ (1-1\/8″, 28.58mm)\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\u003eClean internal female hub threads thoroughly. For brake rotor and pulley installations, apply medium-strength blue thread locker (or anti-seize paste for wheel assembly) to the engagement threads. Tighten in a progressive criss-cross star pattern to factory service specifications (typically 20–24 lb-ft \/ 27–32 N·m for 5\/16″-18 rotor bolts) using a calibrated manual torque wrench. For thread pitch identification and imperial-to-metric fastener guidelines, consult our \u003ca href=\"\/blogs\/technical-resources\/fastener-metrology-how-to-measure-bolt-length-diameter-thread-pitch\"\u003eFastener Metrology \u0026amp; Thread Sizing Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePrice is for 1 bolt. (Always replace brake rotor and wheel hardware in complete sets).\u003c\/em\u003e\u003c\/p\u003e","brand":"Tianswer","offers":[{"title":"Rainbow \/ 25.4mm（1\"）","offer_id":45895598407937,"sku":"TS-516-12P-254-RB","price":4.7,"currency_code":"USD","in_stock":true},{"title":"Rainbow \/ 28.58mm(1.125\")","offer_id":45895598440705,"sku":"TS-516-12P-2858-RB","price":5.1,"currency_code":"USD","in_stock":true},{"title":"Titanium \/ 25.4mm（1\"）","offer_id":45895598276865,"sku":"TS-516-12P-254-TI","price":4.5,"currency_code":"USD","in_stock":true},{"title":"Titanium \/ 28.58mm(1.125\")","offer_id":45895598309633,"sku":"TS-516-12P-2858-TI","price":4.8,"currency_code":"USD","in_stock":true},{"title":"Gold \/ 25.4mm（1\"）","offer_id":45895598342401,"sku":"TS-516-12P-254-GD","price":4.7,"currency_code":"USD","in_stock":true},{"title":"Gold \/ 28.58mm(1.125\")","offer_id":45895598375169,"sku":"TS-516-12P-2858-GD","price":5.1,"currency_code":"USD","in_stock":true},{"title":"Burn Blue \/ 25.4mm（1\"）","offer_id":45895598473473,"sku":"TS-516-12P-254-BB","price":4.7,"currency_code":"USD","in_stock":true},{"title":"Burn Blue \/ 28.58mm(1.125\")","offer_id":45895598506241,"sku":"TS-516-12P-2858-BB","price":5.1,"currency_code":"USD","in_stock":true},{"title":"Black \/ 25.4mm（1\"）","offer_id":45895598539009,"sku":"TS-516-12P-254-BK","price":4.7,"currency_code":"USD","in_stock":true},{"title":"Black \/ 28.58mm(1.125\")","offer_id":45895598571777,"sku":"TS-516-12P-2858-BK","price":5.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/1740\/3393\/files\/516-18-5.jpg?v=1744250903"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/1740\/3393\/collections\/516_516-18-5_33333333.jpg?v=1789479512","url":"https:\/\/tianswer.com\/collections\/5-16-18-titanium-bolt.oembed","provider":"Tianswer","version":"1.0","type":"link"}