Custom high precision CNC machining aerospace steel NPT taper thread plug

Tapered Threads in Aerospace Industry

Tapered threads have specific applications in the aerospace industry, primarily used in the following areas:

1. Connections and Sealing

• Pipeline Connections: Tapered threads are commonly used in connecting pipelines in aircraft, such as fuel systems, hydraulic systems, and gas systems. The tapered design provides effective sealing to prevent leaks.
• Fluid and Gas Sealing: In connection points that require sealing, tapered threads offer effective sealing performance, ensuring system functionality under high pressure and temperature conditions.

2. Component Assembly

• Fasteners: Tapered threads are used for fastening and assembling aircraft components, such as in engine components, wing connections, and other structural parts.
• Adjustment and Locking: They are used in parts that require adjustment and locking, such as adjusters and positioning devices. Tapered threads provide stable adjustment and locking effects.

3. High Precision Requirements

• Precision Fit: The design and manufacturing of tapered threads require high precision to ensure correct fitting and functionality in aerospace applications. Precision-manufactured tapered threads meet the stringent requirements for aerospace components.

4. Maintenance and Repair

• Disassembly and Installation: Tapered threads facilitate easier maintenance and repair of aircraft, especially in parts that require frequent disassembly and reassembly.
• Convenient Adjustment: In parts that need regular adjustment, tapered threads are designed for easy adjustment and reinstallation.

5. Material Selection and Treatment

• High-Temperature and Corrosion Resistance: Tapered threads used in the aerospace industry are typically made from high-strength and corrosion-resistant materials such as stainless steel or titanium alloys to ensure stability and durability in harsh environments.
• Surface Treatment: To enhance wear resistance and corrosion resistance, tapered threads may undergo special surface treatments, such as coatings or hardening.

6. Standards and Certification

• Aerospace Standards: Tapered threads used in aerospace applications must comply with relevant aerospace standards and certifications, such as AS9100, to ensure their quality and reliability.

Tapered threads are widely used in the aerospace industry due to their excellent sealing properties and high precision requirements. Their design and manufacturing must adhere to strict standards to ensure the safety and reliability of aircraft and aerospace components.

The standards for tapered thread fittings mainly include the following:

1. NPT (National Pipe Thread) Standard

• Scope: Widely used in the United States and Canada, suitable for the petroleum, natural gas, and water treatment industries.
• Thread Angle: 60 degrees.
• Tolerance: NPT threads have a broad tolerance range, commonly including Class 1 and Class 2.
• Materials: Typically use carbon steel, stainless steel, copper, etc.
• Application: Suitable for high-pressure environments and sealing connections for liquids and gases.

2. BSP (British Standard Pipe) Standard

• BSPT (British Standard Pipe Tapered):
  • Scope: Mainly used in the UK and other regions, suitable for water and gas pipe connections.
  • Thread Angle: 55 degrees.
  • Application: Suitable for sealing connections for liquids and gases.
• BSPP (British Standard Pipe Parallel):
  • Scope: Similar to BSPT but with parallel threads without taper.
  • Application: Commonly used for pipe connections in low-pressure environments.

3. ISO 7 Standard

• Scope: An international standard that specifies the dimensions and specifications for threaded pipe fittings.
• Type: Includes ISO 7-1 (standard for pipe thread joints) and ISO 7-2 (pressure test for pipe threads).
• Thread Angle: 55 degrees (tapered thread).

4. DIN 2999 Standard

• Scope: A German industrial standard for tapered pipe threads.
• Thread Angle: 55 degrees.
• Application: Suitable for pipe connections for liquids and gases.

5. JIS B 0203 Standard

• Scope: A Japanese industrial standard covering tapered thread fittings.
• Thread Angle: 55 degrees.
• Application: Widely used in various pipe connections in the Japanese market.

6. ASME B1.20.1 Standard

• Scope: Issued by the American Society of Mechanical Engineers (ASME), covering the specifications for NPT thread fittings.
• Thread Angle: 60 degrees.
• Application: Used for pipe connections for high-pressure gases and liquids.

These standards define the dimensions, thread shapes, thread angles, material requirements, and other technical specifications for tapered thread fittings to ensure compatibility and reliability in various applications. The appropriate standard should be selected based on specific application scenarios and market requirements.

In many cases, adhering solely to standard specifications may not be sufficient to meet the stringent sealing requirements of advanced designs. Our precision-grade fittings are engineered to exceed conventional standards, achieving levels up to three times stricter than typical industry requirements, with a 100% compliance rate. This exceptional precision makes our fittings ideal for use in demanding applications, including the aerospace industry and ultra-high-pressure hydraulic systems.

Our capabilities extend to custom-engineering various threaded products to meet the specific needs of high-end clients both in China and internationally. We employ meticulous microscopic inspection and measurement techniques to ensure that every component adheres to the highest standards of quality and performance.

Our commitment to precision and reliability ensures that our fittings can withstand the most challenging environments and applications, providing robust solutions for critical systems that demand exceptional performance and durability.