.250-28 UNJF-3B: Understanding the Dimensions and Applications of this Fastener
Introduction
The .250-28 UNJF-3B is a type of fastener that is commonly used in various industries, including aerospace, automotive, and construction. In this article, we will delve into the dimensions and applications of this fastener, as well as its characteristics and advantages.
Dimensions
The .250-28 UNJF-3B fastener has a diameter of 0.250 inches (6.35 mm) and a thread pitch of 28 threads per inch (TPI). The "UNJF" designation refers to the fastener's thread form, which is a unified national jet fuel thread. The "3B" suffix indicates that the fastener has a bounded thread, meaning that the thread is confined within a specific diameter.
The overall length of the fastener can vary depending on the specific application, but it typically ranges from 1/2 inch to 6 inches (12.7 mm to 152.4 mm).
Applications
The .250-28 UNJF-3B fastener is commonly used in high-stress applications where a high level of reliability and safety is critical. Some common applications include:
- Aerospace: The fastener is used in aircraft engines, fuel systems, and other high-performance applications.
- Automotive: It is used in high-performance engine components, fuel systems, and other critical applications.
- Construction: The fastener is used in structural components, such as bridges, buildings, and other high-stress applications.
Characteristics and Advantages
The .250-28 UNJF-3B fastener has several characteristics that make it an ideal choice for demanding applications:
- High-strength: The fastener has a high strength-to-weight ratio, making it ideal for applications where weight is a critical factor.
- Corrosion-resistant: The fastener is made from corrosion-resistant materials, such as stainless steel or titanium, which ensure that it can withstand harsh environments.
- High-temperature resistance: The fastener can withstand high temperatures, making it suitable for applications where heat is a critical factor.
Conclusion
The .250-28 UNJF-3B fastener is a high-performance fastener that is designed for demanding applications. Its unique dimensions, thread form, and materials make it an ideal choice for industries such as aerospace, automotive, and construction. By understanding the characteristics and advantages of this fastener, engineers and designers can specify it with confidence in their designs.
