INT-NPT

Interrupted Taps for American Taper Pipe Threads

Specification

■ 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~

Recommended Tapping Speed depending on Materials

Stainless steels

〜5

For icon explanation, refer to P.50

TYPE:1 TYPE:2

Segment:1G

SizeClassCodeChamferL (inch)ℓ (inch)Projection (inch)Ds (inch)K (inch)ℓk (inch)No. of flutesType
For American Pipe Threads
NPT 1/8-27ANSI GY83151 Y83151BR Y83152 Y83152BR3P2.1250.750.3120.437 0.3120.328 0.2340.37551 2
NPT 1/4-18ANSI GY83153 Y83153BR3P2.4371.0620.4590.5620.4210.43751
NPT 3/8-18ANSI GY83154 Y83154BR3P2.5621.0620.4540.70.5310.551
NPT 1/2-14ANSI GY83155 Y83155BR3P3.1251.3750.5790.6870.5150.62552
NPT 3/4-14ANSI GY83156 Y83156BR3P3.251.3750.5650.9060.6790.68752
NPT 1-11.5ANSI GY83157 Y83157BR3P3.751.750.6781.1250.8430.81252
NPT 1 1/4-11.5ANSI GY83158 Y83158BR3P41.750.6861.3120.9840.93752
NPT 1 1/2-11.5ANSI GY83159 Y83159BR3P4.251.750.6991.51.125172
NPT 2-11.5ANSI GY83160 Y83160BR3P4.51.750.6671.8751.4061.12572