JIC hydraulic fittings, a 37 degree flare fittings meet SAE J514 standard, known for their high-pressure rating and excellent seal, are a staple in industries like agriculture, construction, and manufacturing. If you’re planning to use them, it’s crucial to measure them accurately. Here’s a straightforward guide to help you do just that.
1. Figuring Out the Thread Size
JIC fittings range from 1/8 inch to 2 inches in size. To determine the right size:
- For Male Threads: Measure the outside diameter (OD) of the threaded part using a caliper or thread gauge. Always measure at the widest point.
- For Female Threads: Measure the inside diameter (ID) of the threaded section. Again, use a caliper or thread gauge and measure at the broadest point.
2. Counting the Threads
Next, you’ll want to determine the thread pitch, which is the number of threads per inch (TPI). To do this:
- Use a thread gauge or pitch gauge.
- Slide the gauge over the threads. The blade that fits perfectly between the threads will indicate the TPI.
3. Distinguishing Between Male and Female Fittings
JIC fittings come in three varieties:
- Male JIC Fitting: This has external threads and a 37-degree flare seat. It forms a metal-to-metal bond when paired with its female counterpart.
- Female JIC Fitting: This comes with internal threads, a 37-degree flare seat, and a sleeve. The sleeve compresses onto the male fitting, ensuring a snug fit.
- Female Swivel JIC Fittings: Female Swivel JIC Fittings are composed of two primary components: The Nut: This part features internal UNF threads. The 37-degree Flare Insert: As the name suggests, this insert has a 37-degree flare. Typically, these two components are crimped together to form a single, cohesive piece. This design allows the fitting to swivel, making it easier to connect with its male JIC counterpart. The swivel functionality ensures a more flexible and efficient connection, streamlining the installation process.
4. Checking the Flare Angle
The flare angle is vital for a secure fit. JIC fittings have a standard 37-degree flare angle. To verify:
- Use a flare angle gauge, which has a cone-shaped tool designed for this purpose.
- Place the gauge over the flare. If it aligns perfectly, you’ve got the right 37-degree angle.
In Conclusion
Measuring JIC fittings doesn’t have to be complicated. With the right tools and this guide, you can confidently measure and install them. Always remember to check the thread size, count the threads, determine the fitting type, and confirm the flare angle.
