British Standard Taper Pipe Thread Chart

Thread Angle 55 Degrees

Size

Decimal
Major

Decimal
Minor

TPI

Pitch

Thread
Depth

Radius

1/16

0.304

0.2583

28

0.0357

0.0229

0.0049

1/8

0.383

0.3372

28

0.0357

0.0229

0.0049

1/4

0.518

0.4506

19

0.0526

0.0337

0.0072

3/8

0.656

0.5886

19

0.0526

0.0337

0.0072

1/2

0.825

0.7336

14

0.0714

0.0457

0.0098

3/4

1.041

0.9496

14

0.0714

0.0457

0.0098

1

1.309

1.1926

11

0.0909

0.0582

0.0125

Return To Chart Selection

To Stainless Shop

Return To Main Menu