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TI6AL4V Titanium Alloy Pan Head Bolts

TI6AL4V Titanium alloy Pan head bolts
Material:CP Titanium Grade 2,Titanium alloy Grade 5
Type:Pan-head bolts
Threads:Full threading
Finish:PVD black,Gold; Anodizing colors available
MOQ: 5pcs

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Description

Products introduction

TI6AL4V Titanium alloy Pan head bolts are fasteners manufactured from titanium or titanium alloys, featuring a rounded, pan-shaped head. The head is dome-shaped with a flat underside, and the drive slots are typically cross-recessed (H- or Z-shaped), slotted, or six-lobed, designed for use with standard screwdrivers or specialized tools.

The key advantage of the pan-head design lies in its large contact area, which evenly distributes clamping force across the surface of the joined components, effectively preventing localized indentation or loosening. This characteristic makes them particularly suitable for applications involving composite materials, thin-plate structures, and precision instruments-such as composite structures like helicopter cockpit floors. The wide-head design also reduces the need for countersinking, further lowering the airframe's weight.

In terms of dimensions, thread diameters range from M1.6 to M10, with nominal lengths varying from 3 mm for micro screws to 60 mm for standard fasteners. Head height can be as low as approximately 2 mm, significantly saving installation space. Taking an M4×10 screw as an example, the titanium alloy version weighs only about 0.77 g, which is approximately 40% lighter than a comparable stainless steel fastener.

Major Material Grades and Their Characteristics

The performance of titanium alloy pan-head bolts depends on the selected material. Currently, the mainstream material systems can be divided into three major categories:

1) Industrial-grade pure titanium (Gr1/Gr2):

Represented by GR2, it has a tensile strength of approximately 270–410 MPa and an elongation exceeding 27 percent, with good plasticity, high toughness, and insensitivity to notches. Its density is approximately 4.51 g/cm³, which is only about 60% that of stainless steel. Its outstanding advantages include excellent corrosion resistance and relatively low cost, making it suitable for chemical piping, marine fasteners, and general corrosion-resistant applications. The surface naturally forms a dense oxide film, maintaining stability in oxidizing, neutral, and weakly reducing media.

2) 6AL4V Titanium Alloy (Ti-6Al-4V / Gr5) :

This is the most widely used titanium alloy grade, accounting for approximately 70% of total titanium alloy consumption. Its tensile strength can reach 900–1,100 MPa or higher, approaching that of Grade 10.9 carbon steel bolts, while maintaining good toughness. It exhibits outstanding high-temperature performance and can be used continuously at temperatures up to 600°C; it is commonly used in high-end applications such as aircraft engines and fracture fixation screws. It should be noted that TC4 cannot be formed by cold rolling; it can only be formed by hot rolling, and the maximum usable dimension is limited to approximately 19 mm.

3) β-titanium alloys (e.g., Ti-15-3-3-3):

With a longitudinal elastic modulus of approximately 90 GPa, these alloys combine high strength with excellent fatigue resistance, making them suitable for applications with strict requirements for fatigue life and cleanroom environments, such as robotic joints and semiconductor equipment.

Head Type and Structural Features

Geometric Characteristics of Pan Heads:

Parameters	Feature Description
Top Surface of the Head	Flat or slightly arched roof
Side View of the Head	Vertical Cylindrical Surface
Bottom of the head	Flat, flush with the connected part
Head Diameter	Approximately 1.6 to 2.0 times the thread diameter
Head Height	Approximately 0.5 to 0.7 times the thread diameter
Mounting Method	Pressure applied to the base surface; pressure applied to a non-conical surface

Common Drive Groove Profiles:

Screw Head Groove Type	Features and Use Cases
Phillips	Most common; easy to install automatically, but prone to slipping
Pozidriv	Improved cross-slot design for better slip resistance
Hex Socket / Allen	Can apply high tightening torque; commonly used in high-end equipment
Torx / Star	Anti-slip and wear-resistant-the top choice for precision assembly
Slotted	Traditional type: highly versatile but with limited torque transmission
Torx Tamper Resistant	Tamper-Resistant, Security Applications

Threading Process

Process	Features	Applicable Scenarios
Thread Rolling	The material fibers remain intact, thread fatigue strength is increased by 30–50%, and surface hardness is high.	High-Volume Standard Parts
Fast Thread Rolling	A high-speed version of thread rolling that is extremely efficient	Very large quantities
Thread Turning	High flexibility; can machine non-standard threads, but the fibers are cut.	Small batches, custom-made
Thread Grinding	Highest precision (4H/6H grade), surface roughness Ra < 0.4	Precision Instruments, Aviation

Range of Common Specifications

- Thread diameter: M2 / M2.5 / M3 / M4 / M5 / M6 / M8 / M10 / M12 (most commonly used: M3–M8)
- Thread length: 3 mm – 100 mm (standard series)
- Thread Configuration: Full thread (commonly used for ≤40 mm) / Half thread (long lengths)
- Tolerance Class: 4g, 6g (precision) / 6g (general purpose) / 8g (heavy duty)

Applications

TI6AL4V Titanium alloy Pan head bolts

01. Aerospace

- Airframe structural connections: wing skin, stringers, seat rails
- Engine components: compressor blade fasteners, combustion chamber fasteners
- Spacecraft: satellite structures, rocket bodies (to maximize weight reduction)

02. The Healthcare Sector

- Orthopedic implants: plates and screws for internal fixation of fractures; spinal screw-rod systems
- Dental: implant abutment screws; restoration retention screws
- Surgical instruments: surgical tools; prosthetic connectors
- Requirements: Must be made of ELI-grade (Gr23) or aluminum-free vanadium alloy; surface must be electrolytically polished

03. Cars and Racing

- Engine: Cylinder head bolts, intake manifold bolts, oil pan bolts
- Chassis: Suspension link bolts, brake caliper bolts
- Racing / Modifications: Weight-reduction replacements throughout the vehicle; F1 race cars use almost entirely titanium fasteners
- Motorcycle Modifications: Fairing screws, engine side cover screws, disc brake bolts (the most popular segment in the consumer market)

04. Bicycle

- Stem screws, seatpost clamp screws, and bottle cage screws
- Disc brake caliper mounting screws
- Crank arm mounting bolts
- High-end complete bikes can save 50–150 g in weight

05. Electronics and Communications

- Screws for laptop and smartphone casings (high-end models)
- Base station antennas and RF equipment (magnetically shielded)
- Precision optical instruments

06. Oceanography and Chemical Engineering

- Seawater desalination equipment, ship propeller fasteners
- Fasteners for chemical reactors and heat exchangers
- Offshore platforms, submarine equipment