Auto Parts Fasteners

Product Introduction

6061 Aluminum Alloy Flange Breaking Bolt M16×50 This bolt is made of 6061-T6 aluminum alloy, featuring high strength, lightweight, and corrosion resistance. It is suitable for aerospace, automotive, and lightweight structure connections. M16×50 indicates a nominal diameter of 16mm and a length of 50mm. It is designed as a breaking type (torque-breaking type), and it will break and separate the slot when installed to the set torque, ensuring precise preload and preventing overloading. The surface can be anodized for enhanced wear resistance and appearance. The working temperature range is -50℃ to 150℃. It is widely used in scenarios requiring anti-loosening and detachable flange connections.

Product features

The product is made of 6061-T6 aluminum alloy, with a tensile strength of ≥ 310 MPa. Its weight is only 1/3 of that of steel bolts, making it suitable for fields with strict requirements for weight reduction (such as aerospace and new energy vehicles).

The design is of the breakable type. When the torque reaches the set value, the fracture groove automatically disconnects, ensuring consistent preload and avoiding over-tightening or loosening, thereby enhancing the reliability of the connection.

The surface can be treated with anodizing (available in original color, black, etc.), forming a dense oxide film, which is resistant to salt spray, acid and alkali, and suitable for humid or corrosive environments.

The flange is enlarged to increase the contact area, disperse the pressure, and when paired with serrated or corrugated gaskets, it effectively prevents loosening caused by vibration.

The working temperature range is -50℃ to 150℃, meeting the needs of most industrial scenarios.

M16×50 conforms to ISO/DIN standards and is compatible with conventional flange connections, making installation convenient.

Product Application

Automobile and new energy vehicles: The gearbox shell, motor end cover, battery pack bracket and other aluminum alloy components are connected to significant weight loss (about 65% lighter than steel bolts), improve energy efficiency, avoid electrochemical corrosion caused by steel-aluminum contact, extend component life, and break-break design ensures assembly torque consistency and prevents excessive tightness or looseness (such as Mercedes-Benz gearbox application cases).

Aerospace and rail transit: aircraft skins, lightweight structures of high-speed rail cars, and spacecraft support. The tensile strength of 6061-T6 aluminum alloy is ≥310MPa, which meets high-strength needs, and the anodized surface treatment is resistant to salt spray corrosion and adapts to complex environments.

Wind power and energy equipment: fan blade flange, tower connection, solar bracket, flange surface design enhances anti-loosening ability, resists vibration loads, wide temperature adaptability (-50℃~150℃), suitable for outdoor extreme climates.

High-end mechanical and electronic equipment: robot joints, precision instrument housings, semiconductor equipment frames, lightweight to reduce inertia of moving parts, improve dynamic performance, and avoid electromagnetic interference without magnetic properties (such as medical equipment applications).

Other industrial fields: Shipbuilding: aluminum alloy hull connection, resistant to seawater corrosion, building curtain wall: invisible and tight, beautiful and weather-resistant.

Product advantages

1. Benchmark for lightweight performance: The density is only 35% of that of steel bolts. The weight reduction per piece is up to 65%, making it particularly suitable for applications with high requirements for push-to-fit ratio (for new energy vehicles, every 10% weight reduction can increase the range by 6-8%)

2. Military-grade strength guarantee: After T6 heat treatment, the tensile strength reaches 310-330 MPa, the yield strength is 276 MPa, exceeding the requirements of ASTM F468M standard, the shear strength is 190 MPa, meeting the requirements of aviation-grade fasteners

3. Intelligent pre-tightening technology: Patent-breaking groove design, with torque deviation controlled within ±3%, the pre-tightening force consistency is improved by 80% compared to traditional bolts. Visual breakage indication eliminates the risks of under-tightening or over-tightening

4. Superb environmental adaptability: The anodized oxide film thickness is 20-25 μm, with a salt spray test duration exceeding 1000 hours. The working temperature range is extended to -196°C to 250°C (short-term). It has passed NASA low-pressure gas certification and is suitable for vacuum environments

5. Cost advantage throughout the entire life cycle: Installation efficiency is increased by 40%, no need for secondary calibration, maintenance-free design, the service life is extended by 3-5 times compared to steel. 100% recyclable, in compliance with the EU ELV directive requirements

6. Multi-functional integrated design: The flange surface integrates anti-loosening serrations (60° V-shaped pattern), optional conductive oxidation treatment (contact resistance < 0.1 Ω), head laser marking for traceability, and supports industrial 4.0 management

FAQ

Q1: What is a breakaway bolt?

A1: A breakaway bolt is a specially designed fastener. When the preset torque is reached, its neck-breaking groove will precisely break open, ensuring consistent preload force and avoiding the risks of over-tightening or loosening.

Q2: Why choose 6061 aluminum alloy material?

A2: Lightweighting is approximately 65% lighter than steel bolts, suitable for fields with high requirements for weight reduction such as automobiles and aviation. The corrosion-resistant anodized treatment can withstand salt spray for over 1000 hours, suitable for humid and acidic environments. It is non-magnetic and suitable for scenarios requiring electromagnetic interference prevention in electronics and healthcare.

Q3: What are the advantages of the flange design?

A3: Anti-loosening performance: The enlarged flange surface and the serrated texture increase the contact area, providing stronger resistance to vibration-induced loosening, and reducing the pressure on soft materials (such as plastics and aluminum alloys) to minimize the risk of pressure damage.

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