Size

Standard length

Upper box connection 

Lower pin connection 

I.D(mm)  

Driving section(mm) 

 Thread type(LH)

O.D(mm)

Thread type(LH)

O.D(mm)

Width across flats 

Diagonal width 

in

ft.

Standard

Optional

Standard

Optional

Standard

Standard

Standard

2 1/2

40

6 5/8REG

4 1/2REG

196.8

146

NC26

85.7

31.8

63.5

83.3

3

40

6 5/8REG

4 1/2REG

196.8

146

NC31

104.8

44.4

76.2

100

3 1/2

40

6 5/8REG

4 1/2REG

196.8

146

NC38

120.6

57.2

88.9

115.1

4 1/4

40

6 5/8REG

4 1/2REG

196.8

146

NC46

158.8

71.4

108

141.3

40

6 5/8REG

4 1/2REG

196.8

146

NC50

161.9

71.4

108

141.3

5 1/4

40

6 5/8REG

/

196.8

/

5 1/2FH

177.8

82.6

133.3

175.4

40

6 5/8REG

/

196.8

/

NC56

177.8

82.6

133.3

175.4