AMERICAN STANDARD EXTERNAL TAPER PIPE THREADS
The United States uses ANSI’s American National Standard Pipe Thread Standards to regulate the formation
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STANDARD: NPT or NPTF as specified 45 deg. Chamfer, working face as listed in table.
OPTIONAL: Special working face, bronze bushings.
| 1/16 – 27 | .375 |
| 1/8 – 27 | .375 |
| ¼ – 18 | .562 |
| 3/8 – 18 | .562 |
| ½ – 14 | .712 |
| ¾ – 14 | .724 |
| 1 – 11 ½ | .900 |
| 1 ¼ – 11 ½ | .924 |
| 1 ½ – 11 ½ | .941 |
The United States uses ANSI’s American National Standard Pipe Thread Standards to regulate the formation
Thread rolling is a metal forging process that forms threads into the mirror image of
Most frequently used in the production of threaded rods, bolts, screws, and other metal fasteners, thread