AN Hose size chart

AN hose sizes may puzzle newcomers to automotive and fluid systems. Let’s demystify these measurements and their impact on system performance. By exploring tradeoffs and challenges, we’ll navigate the AN Hose Size Chart with clarity. Considering these factors is vital for informed decision-making.

AN Hose size chart

Table 1: Male AN Fittings

AN SizeThread Size (Male)Nominal OD Hose/Tube SizeMale Fitting Inner DimensionClosest NPT Size
4AN7/16″-201/4″ (0.250″)0.194″1/8″ (0.125″)
6AN9/16″-183/8″ (0.375″)0.302″1/4″ (0.250″)
8AN3/4″-161/2″ (0.500″)0.390″3/8″ (0.375″)
10AN7/8″-145/8″ (0.625″)0.511″1/2″ (0.500″)
12AN1-1/16″-123/4″ (0.750″)0.610″3/4″ (0.750″)
16AN1-5/16″-121″ (1.000″)0.815″1.25″ (1.250″)

Table 2: Female AN Fittings


What is AN Hose?

AN, short for Army-Navy, traces its roots to military specifications. Evolving from military to automotive and industrial applications, AN hose sizes have become ubiquitous. Understanding its origin sheds light on its versatile usage.

Delve into the intricacies of AN hose components and their pivotal role in functionality. Examining these elements illuminates how AN hoses adapt to diverse fluid systems and environments.

Deciphering AN Hose Sizes

AN hose sizes, denoted by numbers like -4, -6, -8, etc., hold significance in fluid system design. Unraveling the correlation between these numbers and hose dimensions clarifies their implications for system performance.

Converting AN hose sizes to metric measurements poses challenges for those accustomed to metric units. Exploring simplified conversion methods bridges the gap between AN and metric systems, facilitating seamless integration and decision-making.

Selecting the Right AN Hose Size

Dive into the critical factors shaping your AN hose size selection, such as fluid type, flow rate, pressure, and spatial limitations. Balancing these considerations is key to optimizing system performance.

Gain valuable insights from experts on choosing the ideal AN hose size for your specific application. These tips ensure not only efficient fluid flow but also uphold system integrity, guaranteeing smooth operation.

AN Hose Fittings and Compatibility

Delve into the diverse array of AN hose fittings and their compatibility with different AN hose sizes. Understanding these fittings is crucial for ensuring a seamless fit and optimal performance.

Gain valuable insights into the process of matching AN hose sizes with compatible fittings. By avoiding mismatches, you can prevent issues like leaks and pressure drops, thereby maintaining system efficiency and reliability.

Common Mistakes to Avoid

Gain insight into the consequences of selecting an incorrect AN hose size and strategies for steering clear of common sizing errors. Balancing factors like flow rate and pressure is essential for achieving optimal system performance.

Understand the complications that arise from incorporating different AN hose sizes within the same system. Maintaining consistency in AN hose sizes is crucial for avoiding inefficiencies and ensuring smooth operation.


With a comprehensive grasp of AN hose sizes, you’re poised to make informed choices in fluid system design and maintenance. Embrace the versatility and reliability of AN hoses across automotive, industrial, or recreational applications, enhancing your fluid system expertise and performance.


Q1: What do AN hose sizes mean?
A1: AN hose sizes, denoted by numbers like -4, -6, -8, etc., correspond to specific hose dimensions. These numbers indicate the diameter of the hose in 1/16th of an inch increments. For instance, -4 AN corresponds to a 1/4-inch diameter hose, while -6 AN represents a 3/8-inch diameter hose.

Q2: How do I choose the right AN hose size for my application?
A2: Selecting the appropriate AN hose size involves considering factors such as fluid type, flow rate, pressure, and spatial constraints. It’s essential to balance these factors to ensure optimal system performance. Consulting a compatibility guide and seeking expert advice can help you make informed decisions.

Q3: Can I mix different AN hose sizes within the same system?
A3: Mixing different AN hose sizes within the same system can lead to complications such as uneven fluid flow, pressure drops, and potential leaks. It’s crucial to maintain consistency in AN hose sizes to ensure system efficiency and reliability.

Q4: How do I convert AN hose sizes to metric measurements?
A4: Converting AN hose sizes to metric measurements can be achieved using a simplified conversion method. For example, a -6 AN hose corresponds roughly to a 9.5mm diameter. However, it’s advisable to consult a conversion chart or calculator for precise conversions.

Q5: What are the common mistakes to avoid when selecting AN hose sizes?
A5: Common mistakes include oversizing or undersizing, which can result in inefficient fluid flow or compatibility issues. It’s also important to avoid mixing different AN hose sizes within the same system to prevent complications. By understanding these pitfalls and seeking expert guidance, you can make informed choices.