55 ° cylinder provides the type of whorl and measure

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Whitworth of British Pipe Thread (is in charge of whorl)- - columnar (BSPP/BSPF) whorl code name is basic every inches of tooth counts Mmp of pitch of Mmd=D of dimension old way MmG 1/8 1/8"9 of dimension of bottom outlet of H1 of tooth of D3 of the whorl outside trail of Mmd2=D2 of the diameter in Tpi height.

7280.

907289.

1478.

5660.

5818.

7G 1/4 1/4"13.

1571.

3371912.

30111.

4450.

85611.

6G 3/8 3/8"16.

6621.

3371915.

80614.

950.

85615G 1/2 1/2"20.

9551.

8141419.

79318.

6311.

16219G 5/8 5/8"22.

9111.

8141421.

74920.

5871.

16220.

75G 3/4 3/4"26.

4411.

8141425.

27924.

1171.

16224.

5G 7/8 7/8"30.

2011.

8141429.

03927.

8771.

16228G 1 1"33.

2492.

3091131.

7730.

2911.

47930.

5G 1 1/8 1 1/8"37.

8972.

3091136.

41834.

9391.

47935G 1 1/4 1 1/4"41.

912.

3091140.

43138.

9521.

47939.

5G 1 3/8 1 3/8" 44.

3232.

3091142.

84441.

3651.

47941.

5G 1 1/2 1 1/2"47.

8032.

3091146.

32444.

8451.

47945G 1 3/4 1 3/4"53.

7462.

3091152.

26750.

7881.

47951G 2 2"59.

6142.

3091158.

13556.

6561.

47957G 2 1/4 2 1/4"65.

712.

3091164.

23162.

7521.

47963G 2 1/2 2 1/2"75.

1842.

3091173.

70572.

2261.

47972.

5G 2 3/4 2 3/4"81.

5342.

3091180.

05578.

5761.

47979G 3 3"87.

8842.

3091186.

40584.

9261.

47985.

5G 3 1/4 3 1/4"93.

982.

3091192.

50191.

0221.

47991G 3 1/2 3 1/2"100.

332.

3091198.

35197.

3721.

47997.

75G 3 3/4 3 3/4"106.

682.

30911105.

201103.

7221.

479104G 4 4"113.

032.

30911111.

55110.

0721.

479110.

5G 4 1/2 4 1/2"125.

732.

30911124.

251122.

7721.

479123G 55"138.

432.

30911136.

951135.

4721.

479136G 5 1/2 5 1/2"151.

132.

30911149.

651148.

1721.

479148.

5G 6 6"163.

832.

30911162.

351160.

8721.

479161.

5 CNC Milling