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 

3

40

6 5/8REG

4 1/2REG

196.8

146

NC26

85.7

31.8

76.2

85.7

3 1/2

40

6 5/8REG

4 1/2REG

196.8

146

NC31

104.8

44.4

88.9

100.8

4 1/4

40

6 5/8REG

4 1/2REG

196.8

146

NC38

120.6

57.2

108

122.2

40

6 5/8REG

4 1/2REG

196.8

146

NC38

120.6

57.2

108

122.2

5 1/4

40

6 5/8REG

/

196.8

/

NC46

158.8

76.2

133.3

151.6

40

6 5/8REG

/

196.8

/

NC50

161.9

82.6

133.3

151.6

6    

40

6 5/8REG

/

196.8

/

5 1/2FH

177.8

88.9

152.4

173

40

6 5/8REG

/

196.8

/

NC56

177.8

88.9

152.4

173