Technical Information
Understanding AN Thread Sizes
Use this table to determine the AN thread size before ordering. The chart shows the corresponding metal tube outer diameter and thread size for each size. |
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| Understanding NPTThread Sizes
Use the figures below to determine the NPT thread size before ordering. The chart shows the corresponding thread size, threads per inch, inner diameter and closest AN fitting size for each. |
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| AN Size | Metal Tube O.D. | Thread Size |
| Pipe Thread Size | Threads Per Inch | Fitting I.D. | Closest AN Fitting Size |
| -3 | 3/16" | 3/8-24 UNJ |
| 1/8" | 27 | 1/8" | -4 |
| -4 | 1/4" | 7/16-20 UNJ |
| 1/4" | 18 | 1/4" | -6 |
| -6 | 3/8" | 9/16-18UNJ |
| 3/8" | 18 | 3/8" | -8 |
| -8 | 1/2" | 3/4-16 UNJ |
| 1/2" | 14 | 1/2" | -10 |
| -10 | 5/8" | 7/8-14 UNJ |
| 3/4" | 14 | 3/4" | -12 |
| -12 | 3/4" | 1-1/16-12 UNJ |
| 1" | 11-1/2 | 1" | -16 |
| -16 | 1" | 1-5/16-12UNJ |
| 1-1/4" | 11-1/2 | 1-1/4" | -20 |
| -20 | 1-1/4" | 1-5/8-12 UNJ |
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While we stock most XRP fittings, if your looking for something and it's not on the website give us a call. We can usually get any XRP fitting in a few days.
See the XRP full catalog for more items
http://www.xrp.com/XRPCatalog.pdf
