
■ INT-NPT having low left-hand spiral flutes and having every E other thread ground off, reduces cutting torque. INT-NPT is suitable for such sticky materials as stainless steels and Oxide chrome molybdenum steels. NPT 3/4~
Stainless steels
For icon explanation, refer to P.50
Segment:1G
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | Projection (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | Type |
| For American Pipe T | hreads | ||||||||||
| NPT 1/8-27 | ANSI G | Y83151 Y83151BR Y83152 Y83152BR | 3P | 2.125 | 0.75 | 0.312 | 0.437 0.312 | 0.328 0.234 | 0.375 | 5 | 1 2 |
| NPT 1/4-18 | ANSI G | Y83153 Y83153BR | 3P | 2.437 | 1.062 | 0.459 | 0.562 | 0.421 | 0.437 | 5 | 1 |
| NPT 3/8-18 | ANSI G | Y83154 Y83154BR | 3P | 2.562 | 1.062 | 0.454 | 0.7 | 0.531 | 0.5 | 5 | 1 |
| NPT 1/2-14 | ANSI G | Y83155 Y83155BR | 3P | 3.125 | 1.375 | 0.579 | 0.687 | 0.515 | 0.625 | 5 | 2 |
| NPT 3/4-14 | ANSI G | Y83156 Y83156BR | 3P | 3.25 | 1.375 | 0.565 | 0.906 | 0.679 | 0.687 | 5 | 2 |
| NPT 1-11.5 | ANSI G | Y83157 Y83157BR | 3P | 3.75 | 1.75 | 0.678 | 1.125 | 0.843 | 0.812 | 5 | 2 |
| NPT 1 1/4-11.5 | ANSI G | Y83158 Y83158BR | 3P | 4 | 1.75 | 0.686 | 1.312 | 0.984 | 0.937 | 5 | 2 |
| NPT 1 1/2-11.5 | ANSI G | Y83159 Y83159BR | 3P | 4.25 | 1.75 | 0.699 | 1.5 | 1.125 | 1 | 7 | 2 |
| NPT 2-11.5 | ANSI G | Y83160 Y83160BR | 3P | 4.5 | 1.75 | 0.667 | 1.875 | 1.406 | 1.125 | 7 | 2 |