HARDWARE AN818-4D Aeronautical Standard Tube Coupling Nut

( Brand: Hardware ), ( Manufacturer Part Number: AN818-4D ), ( Part Type: Tube )

Review HARDWARE Aeronautical Standard Tube Coupling Nut

The 818-4D Aeronautical Standard Tube Coupling Nut is an essential component in aerospace and aviation industries, designed to securely connect tubing systems in various aircraft applications. This nut conforms to the SAE Aerospace Standard AS5634 Class IV, ensuring the highest level of quality and reliability.

The 818-4D nut is manufactured from high-strength, heat-treated alloy steel, providing exceptional tensile strength and resistance to fatigue. Its surface is finished with a hardened and plated coating, enhancing its durability and protecting it against corrosion and wear.

This coupling nut features a hexagonal shape and a 17mm pitch diameter, allowing it to be easily tightened and secured using standard socket wrenches. Its thread form is a Unified National (UN) coarse thread, with a 1.000 inch pitch and a left-hand helix angle. The nut has a 0.625 inch nominal diameter and a 1.031 inch outside diameter, making it suitable for use with tubing that falls within the specified range.

The 818-4D Aeronautical Standard Tube Coupling Nut is designed to be used in high-pressure and high-stress environments. Its thread form and mechanical properties enable it to provide a secure and leak-free connection, even under the most demanding conditions. This nut is suitable for use in fuel, hydraulic, and pneumatic systems, as well as other applications where a strong and reliable coupling is essential.

In summary, the 818-4D Aeronautical Standard Tube Coupling Nut is a high-strength, reliable, and corrosion-resistant component that conforms to the SAE Aerospace Standard AS5634 Class IV. Its hexagonal shape, UN coarse thread, and hardened and plated coating make it an ideal choice for securing tubing systems in aerospace and aviation applications where safety and reliability are paramount.

Buying an 818-4D aeronautical standard tube coupling nut involves considering its benefits and drawbacks for your specific application. Here are some potential pros and cons:

1. High-Quality Material: The 818-4D tube coupling nut is made of high-strength materials that meet the aeronautical standard, ensuring durability and reliability in demanding environments.

2. Secure Connection: The 818-4D nut has a tapered design with an internal thread and an external hexagon shape, providing a secure and leak-free connection between tubes.

3. Broad Applicability: These nuts are widely used in various industries, including aerospace, automotive, and oil and gas, where high-pressure and high-temperature applications require strong and reliable connections.

1. Cost: Due to their high-performance materials and aeronautical standard, these nuts can be more expensive than standard tube coupling nuts.

2. Complexity: The tapered design and the requirement for specific tools to install the 818-4D nut may add complexity to the installation process.

3. Limited Sizes: These nuts come in a limited range of sizes, so it may be challenging to find the exact size you need for your application.

When deciding whether to buy an 818-4D aeronautical standard tube coupling nut, consider the specific requirements of your application. If durability, reliability, and a secure connection in high-pressure and high-temperature environments are essential, then the benefits may outweigh the costs and complexity. However, if your application does not require such stringent standards, a standard tube coupling nut may be a more cost-effective and simpler solution.

If you require a high-performance, secure connection for your application in a demanding environment, then an 818-4D aeronautical standard tube coupling nut is a recommended choice. However, if your application does not require such stringent standards, consider a standard tube coupling nut to save on costs and complexity. Always consult the specifications and requirements of your application before making a final decision.

Details:

Most orders ship the same day if placed before 1 PM EST. Why pilots choose us: Same-day shipping on most orders placed before 1 PM EST.

specifications pilogear:

• brand: Hardware
• mpn: An818-4d
• part type: Tube

seller pilogear:

• # reviews: 14809
• city: Melbourne, Florida
• rating: 99.5%

shipping pilogear:

• carrier: USPS
• transit: 3-7 Days
• class: Standard, Expedited
• type: Fixed
• service: Standard, USPS Priority Mail, USPS Priority Mail Express
• cost: $0.00

general pilogear:

• condition: New
• Parts Accessories > Aviation Parts Accessories > Pilot Gear

offer pilogear:

• availability: In Stock
• quantity: 2
• started: October 22, 2025
• sold: 0
• options: Ship-to-home

payments pilogear:

• other
• credit card: Visa
• wallet: Paypal

returns pilogear:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

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