Brand: TSM Technology
Material: Titanium, Nickel, Copper, Aluminum
3 factories*8 production lines*70+ machines
Supply Ability: 300,000 PCS
Size ：M2.5-M64 or Customized
Length: 1mm-1990 mm or customized
Application: Industry
Standards: ASTM, DIN
Delivery time: Usually about 10-25 days（According to your order quantity）
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TSM TECHNOLOGY CO — a premier manufacturer and global supplier of titanium flange bolts from Shaanxi, China. Our titanium hex flange bolts conform to DIN6921 dimensional standards and are forged from aerospace‑grade Ti‑6Al‑4V (Grade 5). The integrated flange eliminates the need for a separate washer, providing uniform bearing pressure and reducing assembly time. Ideal for motorsport, marine, chemical processing, and lightweight structural applications. We maintain deep stock of metric sizes M5 through M16, with competitive factory‑direct price and a minimum order quantity of just 100 pieces per size. Full material certification included with every shipment.
Request Wholesale Quote → MOQ 100 pcs
A titanium flange bolt integrates a circular flange directly under the hex head, functioning as a built‑in washer. This design, standardized under DIN6921 (metric) and similar imperial specifications, offers several critical advantages over standard hex bolts with separate washers. The larger bearing surface distributes clamp load more evenly, reducing the risk of embedding or crushing softer materials such as aluminum, magnesium, or carbon fiber composites. In applications subject to vibration — from engine mounts to exhaust flanges — the flange head helps maintain preload and resists loosening better than a standard hex head with a flat washer.
At TSM, we produce titanium hex flange bolts using hot forging for the head and cold rolling for the threads. This process preserves continuous grain flow from shank to flange, enhancing fatigue resistance. The flange itself is machined to a precise serration pattern (optional) that provides a mild locking effect without damaging the mating surface — a detail particularly valued in motorsport and aerospace assembly.
[Titanium hex flange bolt with serrated bearing surface — Grade 5 Ti-6Al-4V]
Our titanium flange bolts are manufactured to DIN6921 dimensional standards for metric coarse threads (standard) and fine threads (available upon request). The table below outlines our standard stock range. Custom lengths and non‑standard diameters can be produced with a typical lead time of 15–25 working days. All bolts feature a full‑radius root thread profile (rolled) for maximum fatigue life.
| Thread Size | Pitch (mm) | Flange Dia. (mm) ±0.4 | Head Height (mm) | Lengths in Stock (mm) | Stock |
|---|---|---|---|---|---|
| M5 | 0.8 | 11.8 | 3.7 | 8, 10, 12, 16, 20, 25 | High |
| M6 | 1.0 | 14.2 | 4.4 | 10, 12, 16, 20, 25, 30, 35, 40 | Very High |
| M8 | 1.25 | 18.0 | 5.5 | 12, 16, 20, 25, 30, 35, 40, 45, 50, 60 | Very High |
| M10 | 1.5 (std) / 1.25 fine | 22.3 | 7.0 | 16, 20, 25, 30, 35, 40, 50, 60, 70, 80 | High |
| M12 | 1.75 (std) / 1.5 fine | 26.6 | 8.0 | 20, 25, 30, 35, 40, 50, 60, 70, 80, 100 | Medium-High |
| M14 | 2.0 / 1.5 fine | 30.0 | 9.0 | 25, 30, 35, 40, 50, 60, 70, 80 | Medium |
| M16 | 2.0 / 1.5 fine | 34.5 | 10.0 | 30, 35, 40, 50, 60, 70, 80, 100, 120 | Medium |
Imperial sizes (1/4"-20 through 1/2"-13) available on request. Custom serration patterns and under‑head configurations can be specified for OEM applications.
All titanium flange bolts supplied by TSM are manufactured from certified Grade 5 titanium alloy conforming to ASTM B348, AMS 4928, and DIN 65040. Each production lot undergoes tensile testing, hardness verification, and dimensional inspection. Full material test reports (EN 10204 3.1) are provided at no additional cost.
| Property | ASTM B348 Minimum | TSM Typical Production |
|---|---|---|
| Tensile Strength (Ultimate) | 895 MPa (130 ksi) | 930–1,140 MPa |
| Yield Strength (0.2% offset) | 828 MPa (120 ksi) | 850–920 MPa |
| Elongation at Break | 10% | 12–14% |
| Reduction of Area | 25% | 28–35% |
| Hardness (Rockwell C) | 30–36 HRC | 32–34 HRC |
| Density | — | 4.43 g/cm³ |
| Modulus of Elasticity | — | 113.8 GPa |
Compared to standard steel flange bolts (Class 8.8 or 10.9), our titanium hex flange bolts offer equivalent or superior tensile strength at approximately 45% lower weight. In salt spray testing (ASTM B117), Grade 5 titanium exhibits corrosion rates below 0.0005 mm/year, making it ideal for marine, offshore, and chemical processing environments where stainless steel fasteners eventually succumb to pitting and crevice corrosion.
As a specialist manufacturer of titanium flange bolts, we have observed significant performance differences between properly manufactured fasteners and low‑cost alternatives. Two critical process choices separate premium bolts from commodity products:
Rolled threads are cold‑formed under high pressure, compressing the material and inducing beneficial compressive residual stresses at the thread root. This increases fatigue life by approximately 30–40% compared to cut threads. In high‑vibration applications — such as exhaust systems, engine mounts, and rotating machinery — rolled threads are essential for long‑term reliability. TSM uses precision thread rolling dies certified to ISO 965‑1 class 6g/6H tolerances.
The flange head of a DIN6921 bolt experiences significant bending stress at the head‑to‑shank fillet. Our hot forging process, performed at approximately 900°C, aligns the grain structure to follow the contour of the head, eliminating the sharp grain discontinuities found in fully machined bolts. This forging‑based manufacturing yields a fatigue‑resistant component capable of withstanding cyclic loading far longer than machined‑from‑bar equivalents. For OEMs specifying fasteners in safety‑critical assemblies, this difference is non‑negotiable.
Every batch of titanium flange bolts undergoes an 8‑stage inspection: (1) raw material spectrometer verification, (2) dimensional check post‑heading, (3) thread profile optical comparator, (4) Go/No‑Go gauge, (5) Rockwell hardness, (6) tensile test on sample coupons, (7) visual defect inspection, (8) final certification and packing. Our defect rate across 500,000+ flange bolts shipped since 2021 remains below 0.12%.
The unique combination of high strength, low weight, and exceptional corrosion resistance makes titanium hex flange bolts a strategic choice across multiple demanding industries. Based on our sales data and customer feedback, the following applications represent the highest volume use cases:
From Formula 1 suspension uprights to professional drag racing engine builds, titanium flange bolts reduce unsprung and rotating mass. A set of M10 flange bolts for exhaust manifold or turbocharger mounting saves approximately 12–18 grams per fastener compared to steel — a cumulative saving of over 200 grams on a V8 header assembly. The flange design provides secure clamping on thin‑wall stainless tubing without distorting the flange face.
In saltwater environments, even 316 stainless flange bolts eventually pit and fail. Titanium is immune to chloride stress corrosion cracking. Our titanium flange bolts are specified for seawater pump housings, heat exchanger end caps, and offshore instrumentation where 20‑year service life with zero maintenance is expected.
Titanium’s resistance to oxidizing acids (nitric, chromic) and chloride media makes it the material of choice for flanged connections in chlor‑alkali plants, desalination facilities, and geothermal power systems. The flange head design simplifies assembly in tight access areas and ensures gasket compression uniformity.
Where every gram counts and reliability is paramount, titanium flange bolts secure composite panels, engine mounts, and landing gear components. The integrated flange distributes bearing stress, preventing delamination in carbon fiber structures.
As a direct manufacturer in Shaanxi, China, TSM eliminates multiple distribution layers, offering titanium flange bolts at highly competitive price points. Pricing varies primarily with diameter, length, and order quantity. Below is a representative pricing table for natural finish, DIN6921 standard, Grade 5 titanium flange bolts. Volume discounts apply at 500, 1,000, and 5,000+ pieces.
| Size | Length (mm) | 100 pcs Price (USD/pc)* | 500 pcs Price (USD/pc)* | 1,000+ pcs Price (USD/pc)* |
|---|---|---|---|---|
| M6 x 20 | 20 | $0.85 | $0.72 | $0.63 |
| M8 x 25 | 25 | $1.15 | $0.98 | $0.86 |
| M10 x 30 | 30 | $1.85 | $1.58 | $1.39 |
| M12 x 40 | 40 | $2.95 | $2.52 | $2.22 |
| M16 x 50 | 50 | $5.80 | $4.95 | $4.40 |
*Prices FOB China, natural finish, subject to raw material fluctuation. PVD coating / anodizing add 15–25%. Custom lengths, fine threads, and special head markings quoted upon request.
Direct Manufacturer — No intermediaries; full control over quality and cost from our Shaanxi facility.
MOQ 100 Pieces — Accessible for prototyping, small‑batch production, and large‑scale OEM supply.
Comprehensive Stock — Over 250 SKUs of titanium flange bolts ready for immediate shipment.
Customization — Serrated/non‑serrated flanges, custom lengths, fine threads, PVD coatings, and private labeling.
Full Certification — EN 10204 3.1 material reports included; 3.2 witness testing available.
Global Logistics — Air and sea freight, DDP shipping options for EU and North America.
🔗 Explore TSM’s Titanium Fastener Portfolio:
Grade 5 Hex BoltsTitanium Socket Cap BoltsTitanium Washers (Flat & Spring)Titanium Hex Nuts & Flange NutsTitanium Bicycle Bolts
Whether you need a single box of 100 pieces for prototyping or a pallet of M10 flange bolts for production, TSM delivers consistent quality, competitive pricing, and reliable lead times. Request a quote today — response within 4 business hours.
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TSM Technologyis a leading fastener manufacturer with over 20 years of experience in the titanium and nickel industry. With a 3,200㎡ factory and cutting-edge equipment, we specialize in producing high-quality fasteners for automotive, chemical, electronic
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