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BSPP thread data

Time:2019-01-14

The full name of the BSP thread is the British Standard Pipe Thread, which refers to the British standard pipe thread. BSP threads are divided into two types according to their shape: BSPP (British Standard Pipe Parallel) and TapePT (British Standard Pipe Taper). BSPP has other different names, common such as BSPF (British Standard Pipe Fitting), BSPM (British Standard Pipe Mechanical) and PS (British Standard Pipe Straight), However, with the beginning of ISO standardization, these various styles were replaced by a simple and clear letter. This is the G thread, then: G = BSPP = BSPF = BSPM = PS, G thread is divided into inner and outer threads for unsealed connection.


Nominal Size
(inches)

T P I

Pitch
(inches)

Major Diameter
(inches)

Minor Diameter
(inches)

Tapping Drill Size

规格
(英寸)

牙数

螺距

大径

小径

攻丝孔钻头尺寸

1/16

28

0.0357

0.304

0.2583

Letter drill G
(6.6 mm)

1/8

28

0.0357

0.383

0.3372

11/32 inch
(8.73 mm)

1/4

19

0.0526

0.518

0.4546

11.8 mm
(0.4646 inch)

3/8

19

0.0526

0.656

0.5886

15.25 mm
(0.6004 inch)

1/2

14

0.0714

0.825

0.7336

3/4 inch
(19.05 mm)

5/8

14

0.0714

0.902

0.8106

21 mm
(0.8268 inch)

3/4

14

0.0714

1.041

0.9496

24.5 mm
(0.9646 inch)

7/8

14

0.0714

1.189

1.0976

28.25 mm
(1.1122 inch)

1 inch

11

0.0909

1.309

1.1926

30.75 mm
(1.2106 inch)

Unit mm

1/4

19

1.337mm

13.157mm

11.546mm

11.8 mm

1/2

14

1.814mm

20.955mm

18.633mm

(19.05 mm)

规格(英寸)

牙数

螺距

大径

小径

攻丝孔钻头尺寸

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