How do you know your fittings?

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How do you know your fittings?

As mentioned earlier, you can always identify AN fittings based on the male thread size (outside diameter). These sizes are constant regardless of brand, hose type, or fitting configuration. If your fitting has a convex 37 degree flare at the end, the threads will tell you the AN size (and vice-versa).

How do you find fitting threads?

Thread dimensions are based on the ID of the pipe. Use a caliper, measuring tape, or ruler to measure the thread diameter of a male thread or female thread. Measure the inner diameter (ID) of the female thread and the outer diameter (OD) of the male thread. This number will help determine the thread dimension.

How do you measure a hydraulic fitting?

Measuring the Outer Diameter of the thread – place the ID/OD caliper around the threads so as to obtain a snug fit. Measuring the Inner Diameter of the thread – insert the caliper into the fitting so you can obtain the correct measurement, and match it to the data charts provided by the manufacturer.

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How can you tell the difference between BSP and NPT?

However, the designs of the threads differ in two fundamental ways. With NPT, the peaks and valleys of the threads are flat. In BSP, they are rounded. Secondly, the NPT angle of the thread is 60 degrees and the BSP angle is 55 degrees.

How do you identify hydraulic threads?

With the caliper, measure the thread diameter of the largest point (Outside Diameter (O.D.) of male threads; Inside Diameter (I.D.) of female threads). Using the thread gauge, determine the number of threads per inch. Comparison of gauge and coupling threads against a lighted background will ensure an accurate reading.

How do you know if a thread is BSP or metric?

Although BSP is a foreign thread, it isn’t actually metric. This is why it comes in imperial sizes: 1/8, 1/4, 1/2, 3/4, and so on. BSP parallel threads commonly seal via a 30° chamfer on the male thread to a 30° recessed cone inside the female thread (swivel only).

How do you identify metric threads?

For Metric parallel threads, taking a caliper reading of the threads outer diameter in millimetres (mm) will give a reading of the exact thread size but not the thread pitch. For example, a caliper reading of 12.03mm indicates it is very likely a 12mm thread.

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How do you identify BSP fittings?

How to Measure Your BSP Fittings

  1. Measure the outer diameter (OD) of the thread (in inches)
  2. Then subtract 25\% from this (¼ inch)
  3. You’ll then need to make sure it is a BSP fitting so by counting the threads on your coupling, perhaps only just over ¼”, you can just multiply this by four to find the threads per inch.

How do you identify BSP threads?

To find the thread size:

  1. 1) Measure the O.D (outer diameter) of the BSP thread.
  2. 2) Take the O.D measurement (in inches) and subtract 1/4 inch (. 25”).
  3. 1) Multiply 3.5 by 4 to get 14. This is the number of threads per inch.
  4. 2) Combine the thread size with the number of threads per inch and refer to.

How do you identify a BSPP fitting?

You can identify any BSPP or BSPT fitting accurately by measuring across the thread from one side to the other. BSPP fittings can be measured more simply, and their specifications can be identified with a few basic calculations. Measure the thread’s outer diameter (OD) in inches. Subtract 1/4 inch (0.25″) from the OD measurement.

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How do you measure thread size in BSPP?

Subtract 1/4 inch (0.25″) from the OD measurement. So if the OD of a BSPP male thread measures one inch (1″), the thread size will be 3/4. In the chart, you’ll also see Dash Sizes, which are a convenient shorthand reference for identifying the type.

How do you measure the bore size of a BSP fitting?

BSPT fittings can be measured instead using the inner diameter. In this instance, a calliper reading can be obtained from inside the fitting bore. The bore size can then be cross-referenced on the chart with the threads per inch and the thread pitch, to determine the standard BSP size and its associated specifications.

What is the bevel on a BSPP connector?

The connector has a parallel thread with, typically, a 30° bevel on the male thread which fits into a 30° cone recessed into the female thread. In some applications, BSPP fittings require a bonded seal washer or O-ring to make the connection.