Round Sunflower Threaded Tube Connecting Nuts Plum Blossom Shrapnel Bottom Plug Nut

Description

What Are Tube Connecting Nuts?
Tube Connecting Nuts are specialized fasteners designed to securely join tubes or pipes in mechanical and fluid systems. They typically feature a threaded interior that mates with a corresponding threaded fitting, while their exterior may include a hexagonal or flanged design for easy wrench tightening. These nuts ensure leak-proof connections in high-pressure or high-vibration environments, making them essential in plumbing, hydraulic systems, and industrial machinery.

Materials
Tube Connecting Nuts are manufactured from various materials to suit different operational demands:

• Stainless Steel (e.g., SUS304, SUS316): Offers excellent corrosion resistance, ideal for harsh environments like marine or chemical processing3.

• Carbon Steel: Provides high strength and cost-effectiveness, often coated for corrosion protection.

• Brass: Used in plumbing and electrical applications due to its anti-corrosive and conductive properties.

• Aluminum: Lightweight and corrosion-resistant, suitable for aerospace and automotive systems.

Surface Treatments
To enhance durability and performance, these nuts undergo surface treatments such as:

• Zinc Plating: Common for carbon steel nuts, providing basic rust resistance4.

• Passivation (for Stainless Steel): Removes free iron particles to maximize corrosion resistance.

• Nickel or Chrome Plating: Improves wear resistance and aesthetic appeal.

• Black Oxide: Reduces glare and improves friction in high-torque applications.

Specifications
Key specifications include:

• Thread Standards: Metric (e.g., M6, M8) or Imperial (e.g., 1/4″-20, 3/8″-16).

• Size Range: Typically from M4 to M20 or 1/8″ to 1″ in diameter.

• Pressure Rating: Varies by material and design, often rated for 1000+ PSI in hydraulic systems.

Application Fields
Tube Connecting Nuts are widely used in:

• Hydraulic & Pneumatic Systems: Ensuring leak-free connections in high-pressure fluid lines.

• Automotive Fuel Lines: Securing fuel and brake line fittings.

• Industrial Machinery: Joining coolant or lubrication tubes in manufacturing equipment.

• HVAC & Plumbing: Connecting refrigerant lines and water pipes.

Excellent Case: High-Pressure Hydraulic System in Construction Machinery
A leading construction equipment manufacturer faced frequent leaks in their hydraulic excavator systems due to vibration-induced loosening of standard nuts.

Challenge: The existing fittings failed under dynamic loads, causing downtime and fluid leakage.

Solution: The company switched to stainless steel Tube Connecting Nuts with a flanged design and anaerobic thread-locking compound. The nuts’ high tensile strength (up to 165MPa) and corrosion resistance withstood harsh job site conditions18.

Outcome:

• Zero Leaks: The redesigned connection survived 2,000+ hours of vibration testing.

• Cost Savings: Reduced maintenance costs by 40% compared to previous fittings.

• Efficiency Gain: Enabled faster assembly with the flange’s built-in wrench grip.