Titanium Alloy Hexagon Socket Bolts

Product introduction

This product is made of TC4 titanium alloy, which is a typical special material part. Its density is only 57% of steel, its tensile strength can reach more than 1100MPa, it is resistant to seawater corrosion and completely non-magnetic. In addition to standard specifications, non-standard screws of any non-standard length, fine thread and left-hand thread can be provided. If you need a head with a flange, anti-skid teeth or a deeper hexagon, it can be converted into a special shape screw. Based on your weight reduction, corrosion resistance or non-magnetic requirements, we provide customized non-standard screw solutions to support high-end applications such as aerospace, medical implants, and deep-sea equipment, and control quality according to AS9100 or ISO 13485 systems.

 

Product design and features

Product structure composition

Titanium alloy hexagon socket bolts are high-performance fasteners made of titanium alloy and have hexagon socket drive grooves in the head. Its core structure includes: Hexagonal head: It complies with ISO 4762/DIN 912 standards. The hexagonal hole is evenly stressed and can be driven with a hexagonal wrench or hexagonal screwdriver. It is suitable for installation scenarios with limited space.

Precision thread segment: can process various thread specifications such as metric coarse/fine thread, inch UNC/UNF, etc. The accuracy level is usually 6g or higher.

Shaft: Can be designed as fully threaded or partially threaded, with the partially threaded version having a plain shank section, providing more precise positioning and shear load carrying capacity

 

Advantages of titanium alloy material:

Ultra-high specific strength: density is about 4.5g/cm³ (only 57% of steel), tensile strength can reach 900-1200MPa, and the specific strength is significantly better than steel

Excellent corrosion resistance: It has strong resistance to seawater, chloride ions, acid, alkali and salt environments, and can be used for a long time without surface treatment.

Biocompatibility: non-toxic, does not cause allergic reactions, can be implanted into the human body, and is suitable for medical devices

High and low temperature resistance: working temperature range -250℃~600℃, good mechanical properties can still be maintained under high temperatures

Non-magnetic: completely non-magnetic, suitable for magnetic sensitive occasions such as MRI and electronic equipment.

 

Product features

Standard hexagon socket head bolts (such as GB/T 70.1, ISO 4762) are available in fixed series in terms of size, thread, and head height. Our titanium alloy products can be adjusted according to customer needs:

Non-standard length: The standard length series is 5mm, 6mm, 8mm, 10mm... If you need any non-standard size such as 7.5mm, 12.3mm, etc.

Non-standard threads: fine threads (such as M6×0.75), left-hand threads, tapered pipe threads, etc.

Special head type: the inner hexagon can be changed to an inner torx (TX slot) or an inner twelve corners; the head can be equipped with a flange, anti-skid teeth, and centering cone

Special-shaped rod: stepped rod, with positioning step, with annular groove (for circlip)

 

Materials and application areas

TC4 (Grade 5): Ti-6Al-4V, the highest strength (≥1100MPa), most commonly used in aerospace, racing, and medical implants

TA2 (Grade 2): Industrial pure titanium, low strength (≥400MPa), excellent corrosion resistance, chemical equipment, marine engineering, medical equipment

TC11: High-temperature titanium alloy, excellent heat resistance, aerospace engines, high-temperature environments

TB6 (Grade 19): β-type titanium alloy, low elastic modulus, can be cold processed springs, fasteners, medical

 

Application areas:

Aerospace: Aircraft fuselage structure, engine accessories, satellite brackets - weight reduction is the core requirement, and every gram reduced by titanium alloy bolts is extremely valuable

Racing and high-performance cars: F1 racing cars, supercars, motorcycles - reducing unsprung mass can significantly improve handling

Medical devices: orthopedic implants (bone nails, bone plates), surgical instruments, dental implants - biocompatible and non-magnetic required

Marine engineering: deep-sea detectors, submarine equipment, offshore drilling platforms - titanium alloys are far more resistant to seawater corrosion than 316 stainless steel

Chemical industry: reactors, heat exchangers, valves - resistant to strong acid, strong alkali, and chloride ion corrosion

High-end consumer electronics: ultra-thin notebooks, drones, and diving watch casings—paying equal attention to weight reduction and corrosion prevention

 

Quality control and certification system

Test items and methods:

Dimensional accuracy: hexagonal dimensions across flats, thread pitch diameter, head height, total length, three-dimensional coordinate measuring instrument, thread projector (tolerance ±0.05mm)

Material composition: Ti, Al, V, Fe and other element contents Spectral analyzer (in compliance with GB/T 3620 or AMS standards)

Mechanical properties: tensile strength, yield strength, elongation after break Universal testing machine (according to ISO 898 or ASTM F468)

Hardness testing: Rockwell/Vickers hardness hardness tester (TC4 typical value HRC33-39)

Non-destructive testing: surface cracks, internal defects, fluorescent penetrant testing (PT), ultrasonic testing (UT)

Metallographic analysis: grain size, α/β phase distribution, metallographic microscope

 

Certification qualification:

ISO 9001:2015 (whole-process quality management system)

AS9100D (Aerospace Quality Management System)

ISO 13485 (Medical Device Quality Management System)

IATF 16949 (Special Requirements for the Automotive Industry)

RoHS/REACH (environmental compliance)

Can issue third-party testing reports (SGS, TÜV, etc.)

 

Customized services

We specialize in transforming a customer's sketch or a usage problem into mass-produced customized non-standard screws. Here are our customizable dimensions:

Size: any specification (M1.6~M30), any length (3mm~300mm), non-standard head height/diameter

Thread specifications: metric coarse/fine thread, inch UNC/UNF, UNJ aviation thread, MJ thread, left-hand thread, trapezoidal thread

Head type: Internal hexagonal (standard/deepened), internal torx (TX), internal twelve corners, cross recess, slotted head, T-shaped head, head with flange

Rod design: fully threaded, partially threaded, stepped rod, with positioning step, with annular groove, with drilled holes (for fuses)

Material selection: Special material parts: TC4/TA2/TC11/TB6/Zirconium alloy/Niobium alloy/Inconel718

Surface treatment: polished color, anodized (multiple colors), passivation, silver plating (anti-seizing), DLC coating (wear-resistant)

Additional functions: head engraving/engraving LOGO, thread pre-coated with aviation-grade anti-loosening glue (such as Loctite), tail with guide cone, overhead hole

 

Special shape design capabilities:

Anti-loosening structure: head with radial serrations, threaded sections with micro-bead coating, countersunk head with anti-rotation ribs

Lightweight design: weight-reducing holes inside the head and hollow rod (30% weight reduction)

Special-shaped head types: oval head, tapered head, spherical head, ultra-thin head (height is only 1/2 of the standard)

Integrated functions: head with spring (floating bolt), rod with sealing ring groove, tail with internal thread hole

 

Customization process

Requirement input: Provide drawings, samples or detailed description of working conditions (force requirements, environmental conditions, installation space, weight target)

DFM manufacturability analysis: evaluate the process route (cold heading/hot heading/CNC turning/thread rolling) and give optimal suggestions

 

Sample manufacturing:

CNC sample: 5-20 pieces delivered in 5-10 days

Mold samples (cold heading/hot heading): 20-50 pieces delivered in 15-25 days

Installation verification: Customer tests mechanical properties and installation process matching

Mass production: mass production based on confirmed samples

 

FAQ

Q: What are the main advantages of titanium alloy hexagon socket bolts compared with ordinary stainless steel bolts?

A: Three core advantages: ① Lightweight - the weight of the same specification is only 57% of stainless steel, which is of great significance to aerospace, racing, drones and other fields; ② Corrosion resistance - it can resist seawater, acid, alkali and salt corrosion without surface treatment, while 304/316 stainless steel may still be pitted in a chloride ion environment; ③ Non-magnetic - completely non-magnetic, suitable for magnetic field sensitive occasions such as medical MRI and electronic equipment. In addition, as a special material part, titanium alloy is also biocompatible and can be implanted in the human body.

 

Q: Will titanium alloy bolts cause electrochemical corrosion with aluminum alloy or carbon fiber?

A: The potential of titanium alloy is quite different from that of aluminum alloy, and galvanic corrosion may occur in a humid environment. Solution: ① Anodize the surface of the bolt (to form an insulating layer); ② Use isolation washers or apply anti-corrosion sealant during assembly; ③ Choose TA2 pure titanium (lower potential, more compatible). If you need to use aluminum alloy/carbon fiber connection, please specify the working conditions when customizing, and we will recommend the best protection solution.

 

Q: Are titanium alloy hexagon socket bolts easy to "seize"? How to solve it?

A: Titanium alloy materials are prone to cold welding when tightened (when matched with stainless steel and titanium alloy nuts). Solution: ① Use anti-seize lubricant (such as molybdenum disulfide, silver-based anti-seize agent); ② Use different materials for nuts (such as copper alloy, silver-plated nuts); ③ Coating the bolt threads (such as MoS2, DLC coating). For demanding applications, custom non-standard screws are available - with an aerospace-grade anti-seize coating pre-applied to the thread surface.

 

Q: How to verify the authenticity of titanium alloy bolts?

A: We provide the following verification methods: ① Spectral analysis report (showing the content of Ti, Al, V and other elements); ② Hardness test report (TC4 typical value HRC33-39); ③ Density measurement (about 4.5g/cm³); ④ Third-party testing agencies (such as SGS) can issue material identification reports. Each batch of products comes with a material certificate.

 

Q: Can you provide non-standard customization of the inner hexagonal size? For example darker or lighter than standard?

A: Yes. The standard hexagon socket depth has a fixed value, but some installation tools are longer or shorter and the depth needs to be adjusted. This falls under the category of specially shaped screws and we can customize the hexagonal depth to suit your tool size. Note: Too shallow may lead to unstable driving, and too deep may weaken the head strength. Our engineers will give optimal design suggestions.

 

Q: What is the torque standard for titanium alloy bolts? How is it different from stainless steel?

A: The tightening torque of titanium alloy bolts is about 70-80% of that of steel bolts of the same strength (due to the higher friction coefficient). The specific value depends on the material and lubrication conditions. Recommended installation torque ranges are available. For reference: TC4 titanium alloy M6×1.0 (oiled) recommended torque is about 8-10 N·m, and 10.9 grade steel bolts of the same specification are about 12-15 N·m. Torque testing services are available for bulk orders.

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