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Trade manager: cn1501383804

 Hexagonal Kelly Specification 

Norminal
Size

Length
(ft)

Top Upset Joint 

Bottom Upset Joint 

Bore ID

Drive Section 

Est. Weight

k.g.

APIBOX
Thread Left
Hand

Du

Right Hand
Connections 

DL

Across
Corners

Across
Flats

3-1/2

40

6 5/8REG

7 3/4

NC31(2 7/8IF) 

4 1/8 

1 3/4 

3.937

3 1/2 

580

4-1/4

40

6 5/8REG

7 3/4

NC38(3 1/2IF) 

4 3/4 

2 1/4

4.781

4 1/4 

780

5-1/4

40

6 5/8REG

7 3/4

NC46(4 IF)
NC50(4 1/2 IF) 

6～6 3/8
6 1/8～6 3/8 

3
3 1/4 

5.900

5