.2500-28 Unjf-3b

3 min read Jul 03, 2024

.2500-28 UNJF-3B: Understanding the Specifications of this Fastener

The .2500-28 UNJF-3B is a type of fastener that is widely used in various industries, including aerospace, defense, and construction. In this article, we will delve into the specifications and characteristics of this fastener, and explore its applications and benefits.

What does the designation mean?

The designation .2500-28 UNJF-3B is a standardized way of identifying a fastener. Let's break it down:

.2500 refers to the major diameter of the fastener, which is 0.2500 inches.
28 is the number of threads per inch.
UNJF stands for Unified National Jet Fuel, which is a type of thread form.
3B is the class of fit, which indicates the tolerance and precision of the fastener.

Specifications

Here are some key specifications of the .2500-28 UNJF-3B fastener:

Material: Typically made from high-strength, corrosion-resistant materials such as stainless steel or titanium.
Length: Available in various lengths to suit different applications.
Thread: Unified National Jet Fuel thread form, which is designed for high-strength and high-temperature applications.
Class of fit: 3B, which indicates a high degree of precision and tolerance.

Applications

The .2500-28 UNJF-3B fastener is commonly used in:

Aerospace: Engine mounts, fuel systems, and other high-stress applications.
Defense: Weapon systems, military equipment, and other specialized applications.
Construction: High-strength bolting applications, such as bridge construction and heavy machinery.

Benefits

The .2500-28 UNJF-3B fastener offers several benefits, including:

High strength-to-weight ratio: Allows for reduced weight while maintaining high strength and durability.
Corrosion resistance: Made from corrosion-resistant materials to withstand harsh environments.
High-temperature resistance: Suitable for applications where high temperatures are encountered.

Conclusion

In conclusion, the .2500-28 UNJF-3B fastener is a highly specialized and versatile component that is used in a variety of applications where high strength, durability, and precision are critical. Its unique specifications and characteristics make it an ideal choice for industries where reliability and performance are paramount.