Introduction of M4 titanium bolts
M4 titanium bolts are fasteners manufactured through precision machining using high-quality titanium alloys such as Gr1, Gr2, and Gr5, with a nominal thread diameter of 4 millimeters. Thanks to the inherent advantages of titanium alloy, these screws significantly outperform traditional steel screws in terms of lightweight design, corrosion resistance, and non-magnetic properties. They are widely used in fields with stringent performance requirements, such as aerospace, automotive manufacturing, semiconductor equipment, and marine engineering, and can be customized to meet specific customer requirements for special specifications and functions.
basic information
Thread Specifications: Metric coarse thread M4, standard pitch 0.7 mm.
The thread meets precision standards, ensuring smooth engagement and a secure fit. Compatible with standard M4 nuts and through holes, offering high versatility.
Standards Compliance: Complies with major standards including German DIN, International Standard (ISO), and Japanese JIS. Common standard models include DIN 912 (hex socket head cap), DIN 7991 (countersunk). Dimensions are precise, ensuring good interchangeability; these screws can directly replace equivalent steel or stainless steel screws.
Material Classification:
Two main material options are available to suit different operating conditions:
- GR2 Industrial Pure Titanium: High purity, excellent ductility, good toughness, outstanding corrosion resistance, and superior machinability. Suitable for applications requiring high rust and corrosion resistance with moderate load-bearing demands.
- GR5 (Ti-6Al-4V) aerospace-grade titanium alloy: A high-strength titanium alloy with strength far exceeding that of pure titanium; tensile strength can reach over 895 MPa. Combining lightweight properties with high strength, it is suitable for heavy-duty, high-load, and precision load-bearing applications.
Common Specifications and Dimensions
Length Range:
Standard stock lengths: 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm. Custom lengths are available upon request.
Common Head Styles:
- Hex Socket Cylinder Head: Distributes force evenly, provides high torque, and offers easy installation. This is a universal style for industrial, equipment, and modification applications, compliant with the DIN 912 standard.
- Cross-recessed countersunk/flat head: Flush with the workpiece surface after installation, providing a neat, space-saving appearance; suitable for securing panels and enclosures.
- Pan head/half-round head: Rounded head with a large contact area that minimizes damage to the workpiece; suitable for securing thin sheets and plastic parts.
- Hex head/flange face: Large contact area, slip-resistant and anti-loosening, suitable for heavy-duty fastening and vibration-prone environments.
Drive Types:
Hex, Phillips, slotted, and Torx. Custom drive types are available to accommodate various installation tools.
Surface Finishes and Custom Colors
Basic Surface Treatments
Acid Washing and Passivation: Removes surface oxidation layers, forms a dense oxide film, and enhances corrosion resistance
Mechanical Polishing: Ra 0.8–1.6 μm, suitable for general industrial applications
Mirror Polishing: Ra ≤0.4 μm, suitable for medical devices and cosmetic components
High-End Coloring Processes
Vacuum Nitriding: Gold, Blue, Black-deep, lasting colors with excellent wear resistance
Anodizing: Candy colors, green, purple, ice blue-vibrant colors, customizable Pantone shades
PVD Coating: Physical vapor deposition, high coating hardness and strong adhesion
Typical Applications
Aerospace
Fastening of UAV structural components (weight reduction and extended flight time)
Satellite mounts, aircraft interior components
Compliant with the AS9100 aerospace quality management system
Medical Devices
Precision connections for surgical robots
External fixation devices, orthopedic devices
Compliant with FDA 21 CFR Part 820 and ISO 13485
High-End Sports Equipment
Road bike and mountain bike drivetrains, brake assemblies
Lightweight modifications for race cars
Ski bindings
Industrial and Electronic Applications
Semiconductor Equipment (Non-magnetic, Copper-free)
Marine Exploration Equipment (Seawater-resistant)
Precision Instruments and Meters
Products showcase
our company introducing
One-stop Titanium Fasteners Factory in China
We Baoji Reliab Metal Material Co.,Ltd was founded in year 2014, located in the famous 'China Titanium Valley--BAOJI', under the strong R&D ability and continuously development, our mainly products have including titanium&titanium alloy bars/rods, plates, tubes, forgings, fasteners&machined parts, also zirconium and nickel products.
We have passed the Quality System Certificate of ISO 9001-2015, aiming for the satisfactions of different customers' requests.
contact us
E-mail: garychen3215@hotmail.com
Address: No.35, Baoti Rd, Baoji city, Shaanxi Province, China
Contact: Mr. Gary Chen
Phone: +86-917-8883215
Mobile/WhatsApp: +86 13092900605
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