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Secoroc Drill Pipe catalog page


Drill Pipe

 

Atlas Copco Rock Drilling Tools -
Secoroc Drill Pipe Product Catalog

 

 

 

 

 

Secoroc tubesSecoroc Tubes -- Part of a Productive Package

 

Though their importance is often underestimated, tubes play an important role in DTH drilling -- regardless of application, rock type, hole depth, or drill rig. The key features of a high quality DTH tube are durability, accuracy, and manageability.

 

High Quality Tubing

 

Secoroc tubes are made from cold drawn tubing, providing a superior surface finish and tolerance compared to their hot-rolled counterparts. Our solution drastically reduces the risk of scaling -- the cause of so many premature hammer failures.

 

No Weak Links

 

Traditionally the threads and the joint between the tube and the end-pieces are vulnerable. To combat the problem we've friction-welded the joints for maximum strength and heat-treated the end-pieces for optimum durability.

 

Never Losing the Thread

 

Heat-treating the threads ensures not only a long service life, but also simplifies joining and breaking -- thereby cutting cycle time. To meet varying demands, we provide a selection of API threads. For applications where foam injection are used, we recommend the IF thread. Naturally, we also offer a wide range of subs and crossovers -- all made of high quality steel and heat-treated in the same way as tube end-pieces.

 

     Pipes

From 4-1/2" and Wall Thickness >0.346"
Hot Rolled Grade API J-55

Technical Spec:

 

Tubing J-55
Tool Joints, Adapters
Tensile Strength (RM) min.
75,000 PSI
Surface Hardness 58-62 HRC
Yield Strength (ReH) min.
55,000 PSI
Depth 0.080"
Elongation (A5) min.
15%
 Core Hardness 32-36 HRC (approx. 300 HB)

 

Hot rolled tubing fits inside the API N-80 standard, but it has the following shortcomings:

 

  1. The hot rolled surface is rough and can release scaling from the inside, which can enter into the hammer and cause severe damage to internal components.
  2. A rough surface gives higher friction losses, resulting in a higher pressure drop in the drill string.
  3. Wide tolerance of the wall thickness +/- 10-12%.
  4. Straightness tolerance not assigned. Must be straightened after welding.
  5. Production problems due to wide tolerances.

 

From 2-3/4" to 4-1/2" and Wall Thickness <0.346"
Cold Drawn Tubing Grade API N-80

Technical Spec:

 

Tubing N-80
Tool Joints, Adapters
Tensile Strength (RM) min.
100,000 PSI
Surface Hardness 58-62 HRC
Yield Strength (ReH) min.
80,000 PSI
Depth 0.080"
Elongation (A5) min.
18%
 Core Hardness 32-36 HRC (approx. 300 HB)

 

In order to improve the quality of DTH tubes we are now changing over to cold drawn tubing, and the features and benefits are as follows:

 

Feature
Hot Rolled Tubing
Cold Drawn Tubing
Ovality Included in the tolerance for the wall

Included in the tolerance for the wall

Wall Thickness
+/- 10-12%
+/- 3-4%
Straightness
N/A
0.012"/ft

 

Benefits in Short of Cold Drawn Tubing:

 

  • Reliable wall thickness
  • Less ovality, less risk of eccentric wear
  • Better quality of the friction weld, less risk of concentricity of welding
  • Better wear resistance due to increased hardness
  • Reliable weights max 2-3% variance
  • Less risk of damage to the tube from the straightening operation
  • An overall weight reduction of our DTH tube assortment
  • Still API N-80 standard for tubing

 

Friction Welding 2-3/4" to 5-1/2"
Over 5-1/2" Shrink Fit and Stick Welded

 

Friction Welding in action

 

Friction Welding:

 

  • Friction welding is a safe and efficient way to weld the end-pieces on to the tube material. The welding becomes stronger than the tube.
  • Friction welding is a combination between friction and pressure.
  • The end-pieces rotate with a speed of 480 RPM, and the pressure is between 1,015 PSI and 2,175 PSI depending on the tube diameter and wall thickness.

 

Friction Welded joints, inside

 

Friction Welded:

 

  • Friction welding gives much stronger joints, compared with electrode welding, due to less risk of impure joints.

 

DTH Hammer with DTH Bit

 

Rotary Head

Spindle
Adapter
Drill Pipe
Starter
Pipe
Sub
Adapter
DTH Hammer
DTH bit

 

Hammer with Rotary Bit

 

Rotary
Head

Spindle
Adapter
Drill
Pipe
Starter
Pipe
Sub
Adapter
Rotary
Bit

Rotary Head The power unit that rotates the drill string.
Spindle Adapter Also called a "saver sub," threads into the rotary head and drill pipe, protects the threads of the rotary head, considered to be part of rotary head.
Drill Pipe Available in a variety of lengths, diameters, wall thicknesses, and thread configurations.
Starter Pipe Similar to the drill pipe, always the first pipe in the hole, usually shorter to compensate for the length of the DTH hammer, and with a greater wall thickness to withstand more abrasion as the hole is drilled.
Sub Adapter

Usually a short adapter, threaded on both ends in a male/female, female/female, male/male configuration. May be used to increase or decrease the thread diameter or change the thread style as needed for a particular application.

DHT Hammer/ DTH Bit The percussive mechanism that drills the hole. Available in a wide range of diameters and styles depending on the application.
Rotary (Tricone) Bit May take the place of the DTH Hammer and Bit in applications where percussive drilling is not required.

Jump to your rig application     DM30/45/50/L, T4W, T4BH, RD20      DMM-3      ECM695/760/780      PV-271
 PV-351     T2, T3, TH60/75E/100A     Simba Rig     ROC F6/L6/L8    Other applications

Traditional Rig Application: DM30/45/50/L, T4W, T4BH, RD20
*(except as noted)

Inch to mm conversion chart

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box*
Component
Wall Thickness (inch)
Length (feet)
inch
flat
location
Hex
(inch)
Weight
(lbs.)
3.50
2-3/8 API reg
Pipe
0.500
30.0
3.5
Both Ends
No
491
3.50
2-3/8 API reg
Pipe
0.337
25.0
2.5
Both Ends
No
315
3.50
2-3/8 API reg
Starter Pipe
0.750
21.0
2.5
Both Ends
No
485
3.50
2-3/8 API reg
Starter Pipe
0.500
26.6
3.5
Both Ends
No
441
4.00
2-7/8 API reg
Pipe
0.337
30.0
3.5
Pin Only
3.50
489
4.00
2-7/8 API reg
Pipe
0.750
30.0
3.5
Pin Only
3.50
751
4.00
2-7/8 API reg
Pipe
0.337
25.0
3.5
Pin Only
3.50
421
4.00
2-7/8 API reg
Pipe
0.337
25.0
3.0
Both Ends
No
410
4.00
2-7/8 API reg
Pipe
0.337
25.0
3.5
Both Ends
No
410
4.00
2-7/8 API reg
Starter Pipe
0.750
26.6
3.5
Pin Only
No
520
4.00
2-7/8 API reg
Starter Pipe
0.337
21.0
3.0
Both Ends
No
313
4.00
2-7/8 API reg
Starter Pipe
0.337
21.0
3.5
Both Ends
No
313
4.00
2-7/8 API reg
Starter Pipe
0.750
21.0
3.5
Both Ends
No
388
4.50
2-7/8 IF
Pipe
0.337
25.0
3.5
Pin Only
4.00
412
4.50
2-7/8 IF
Starter Pipe
0.625
21.0
3.5
Both Ends
No
584
4.50
2-7/8 IF
Pipe
0.337
30.0
3.5
Pin Only
4.00
489
4.50
2-7/8 IF
Pipe
0.337
20.0
3.5
Box Only
No
344
4.50
3-1/2 API reg
Pipe
0.625
25.0
3.5
Pin Only
4.00
833
4.50
3-1/2 API reg
Pipe
0.337
30.0
3.5
Pin Only
4.00
489
4.50
3-1/2 API reg
Pipe
0.750
30.0
3.5
Pin Only
4.00
989
4.50
3-1/2 API reg
Pipe
0.500
30.0
3.5
Pin Only
4.00
667
4.50
3-1/2 API reg
Pipe
0.430
35.0
3.5
Pin Only
4.00

760
4.50
3-1/2 API reg
Starter Pipe
0.750
26.6
3.5
Pin Only
No
855
4.50
3-1/2 IF
Pipe
0.337
20.0
3.5
Box Only
No
344
5.00
3-1/2 API reg
Pipe
0.375
25.0
3.5
Pin Only
4.00
562
5.00
3-1/2 API reg
Pipe
0.500
25.0
3.5
Pin Only
4.00
630
5.00
3-1/2 API reg
Pipe
0.750
25.0
3.5
Pin Only
4.00
907
5.00
3-1/2 API reg
Pipe
0.500
30.0
3.5
Pin Only
4.00
756
5.00
3-1/2 API reg
Pipe
0.337
30.0
3.5
Pin Only
4.00
837
5.00
3-1/2 API reg
Pipe
0.750
30.0
3.5
Pin Only
4.00
1,081
5.00
3-1/2 API reg
Pipe
0.500
35.0
3.5
Pin Only
4.00
874
5.00
3-1/2 API reg
Pipe
0.750
35.0
3.5
Pin Only
4.00
1,264
5.00
3-1/2 API reg
Starter Pipe
0.750
26.6
3.5
Both Ends
No
980
5.00
3-1/2 API reg
Starter Pipe
0.375
21.6
3.5
Both Ends
No
485
5.00
3-1/2 API reg
Starter Pipe
0.750
29.6
3.5
Both Ends
No
1,086
5.00
3-1/2 API reg
Starter Pipe
0.750
31.6
3.5
Both Ends
No
1,159
5.00
3-1/2 Beco
Pipe
0.750
30.0
3.5
Pin Only
4.62
1,097
5.00
3-1/2 Beco
Pipe
0.500
30.0
3.5
Pin Only
4.62
773
5.00
3-1/2 Beco
Pipe
0.500
35.0
3.5
Pin Only
4.62
892
5.00
3-1/2 Beco
Pipe
0.500
25.0
3.5
Pin Only
4.62
654
5.00
3-1/2 Beco
Starter Pipe
0.500
26.6
3.5
Pin Only
No
573
5.00
3-1/2 Beco
Starter Pipe
0.500
21.6
3.5
Pin Only
No
551
5.50
3-1/2 Beco
Pipe
0.415
25.0
4.5
Both Ends
5.00
733
5.50
3-1/2 Beco
Pipe
0.415
30.0
4.5
Both Ends
5.00
866
5.50
3-1/2 Beco
Pipe
0.750
30.0
4.5
Both Ends
5.00
1,240
5.50
3-1/2 Beco
Pipe
0.750
25.0
4.5
Both Ends
5.00
1,044
5.50
3-1/2 Beco
Pipe
0.750
35.0
4.5
Both Ends
5.00
1,434
5.50
3-1/2 Beco
Starter Pipe
0.415
25.8
4.5
Both Ends
No
685
5.50
3-1/2 Beco
Starter Pipe
0.415
20.8
4.5
Both Ends
No
621
6.25
4 Beco
Pipe
0.500
25.0
4.5
Both Ends
5.00
868
6.25
4 Beco
Pipe
0.500
30.0
4.5
Both Ends
5.00
1,013
6.25
4 Beco
Pipe
0.750
30.0
4.5
Both Ends
5.00
1,447
6.25
4 Beco
Pipe
0.500
35.0
4.5
Both Ends
5.00
993
6.25
4 Beco
Pipe
0.750
35.0
4.5
Both Ends
5.00
1,678
6.25
4 Beco
Starter Pipe
0.500
25.8
4.5
Both Ends
No
899
6.25
4 Beco
Starter Pipe
0.500
20.8
4.5
Both Ends
No
747
 
7.00
4-1/2 Beco
Pipe
0.750
25.0
5.0
Pin Only
6.00
1,410
7.00
4-1/2 Beco
Pipe
0.750
30.0
5.0
Pin Only
6.00
1,672
7.00
4-1/2 Beco
Pipe
0.750
35.0
5.0
Pin Only
6.00
1,945
7.00
4-1/2 Beco
Pipe
0.500
30.0
5.0
Pin Only
6.00
1,174
7.00
4-1/2 Beco
Pipe
0.500
25.0
5.0
Both Ends
6.00
1,042
7.00
4-1/2 Beco
Pipe
0.500
30.0
5.0
Both Ends
6.00
1,200
7.00
4-1/2 Beco
Pipe
0.500
35.0
5.0
Both Ends
6.00
1,372
7.00
4-1/2 Beco
Pipe
0.750
30.0
6.0
Both Ends
6.50
1,703
7.00
4-1/2 Beco
Pipe
1.000
25.0
6.0
Both Ends
6.50
1,443
7.00
4-1/2 Beco
Starter Pipe
0.500
25.7
5.0
Pin End
No
1,205
 
7.62
5-1/4 Beco
Pipe
0.750
25.0
6.0
Both Ends
6.50
1,571
7.62
5-1/4 Beco
Pipe
0.875
25.0
5.0
Pin Only
6.50
1,709
7.62
5-1/4 Beco
Pipe
0.750
30.0
6.0
Both Ends
6.50
1,857
7.62
5-1/4 Beco
Pipe
0.750
30.0

6.75
Both Ends
No
1,877
7.62
5-1/4 Beco
Pipe
1.000
30.0
6.0
Both Ends
6.50
2,220
 
7.00
4-1/2 Beco
Pipe
0.625
35.0
5.75
Both Ends
No
1,619
7.00
4-1/2 Beco
Pipe
1.000
35.0
5.75
Both Ends
No
2,077
7.00
4-1/2 Beco
Pipe
0.750
35.0
5.75
Both Ends
No
1,945
7.00
4-1/2 Beco
Starter Pipe
1.000
30.3
5.75
Both Ends
No
1,760
7.00
4-1/2 Beco
Starter Pipe
0.750
29.0
5.75
Both Ends
No
1,652
7.00
5-1/4 Beco
Pipe
0.625
35.0
6.50
Both Ends
No
1,619
7.00
5-1/4 Beco
Starter Pipe
0.625
31.9
6.50
Both Ends
No
1,478
7.00
5-1/4 Beco
Starter Pipe
0.625
32.9
6.50
Both Ends
No
1,522
 
7.62
5-1/4 Beco
Pipe
1.000
45.0
6.75
Both Ends
No
2,921
7.62
5-1/4 Beco
Pipe
0.750
45.0
6.75
Both Ends
No
2,740
7.62
5-1/4 Beco
Pipe
1.000
35.0
6.75
Both Ends
No
2,223
7.62
5-1/4 Beco
Pipe
0.750
35.0
6.75
Both Ends
No
1,963
7.62
5-1/4 Beco
Starter Pipe
1.000
32.9
6.75
Both Ends
No
2,408
 
8.62
6 Beco
Pipe
0.906
50.0
7.75
Both Ends
No
5,410
8.62
6 Beco
Starter Pipe
1.000
32.9
7.75
Both Ends
No
2,879
 
10.75
8 Beco
Pipe
1.000
6.83
9.25
Both Ends
No
1,306

Inch to mm conversion chart

Traditional Rig Application: DMM-3

Top of list

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box
Component
Wall Thickness (inch)
Length (feet)
inch
flat location
Hex
(inch)
Weight
(lbs.)
7.00
4-1/2 Beco
Pipe
1.000
40.0
5.75
Both Ends
No
2,394
7.62
5-1/4 Beco
Pipe
1.000
40.0
6.75
Both Ends
No
3,223
8.62
6 Beco
Pipe
1.000
40.0
7.75
Both Ends
No
4,595
10.75
8 Beco
Pipe
1.000
40.0
9.25
Both Ends
No
5,471

Inch to mm conversion chart

Traditional Rig Application: ECM695/760/780

Top of list

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box
Component
Wall Thickness (inch)
Length (feet)
inch
flat location
Hex
(inch)
Weight (lbs.)
3.00
2 Z
Pipe
0.250
13.0
2.25
Both Ends
No
104
3.00
2 Z
Pipe
0.500
13.0
2.25
Both Ends
No
176
3.00
2 Z
Starter Pipe
0.250
8.8
2.25
Both Ends
No
73
3.00
2 Z Pin,
2-3/8 API reg box
Starter Pipe
0.500
8.0
2.25
Both Ends
No
132
3.00
2-3/8 API reg
Pipe
0.254
10.0
2.25
Both Ends
No
79
3.50
2-1/2 Z
Pipe
0.254
13.0
2.74
Both Ends
No
126
3.50
2-1/2 Z Pin,
2-3/8 API reg box
Starter Pipe
0.368
8.86
1.75
Pin Only
No
106
3.50
2-1/2 Z Pin,
3-1/2 API reg box
Starter Pipe
0.368
9.0
2.74
Both Ends
No
110
4.00
2-1/2 Z
Pipe
0.250
13.0
3.00
Both Ends
No
148
4.00
2-1/2 Z
Starter Pipe
0.250
8.0
3.00
Both Ends
No
95
4.00
2-1/2 Z Pin,
3-1/2 API reg box
Pipe
0.500
13.0
3.00
Both Ends
No
249
4.00
2-1/2 Z Pin,
3-1/2 API reg box
Starter Pipe
0.500
9.0
3.00
Both Ends
No
88

Inch to mm conversion chart

Traditional Rig Application: PV-271

Top of list

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box
Component
Wall Thickness (inch)
Length
(feet)
inch
flat location
Hex
(inch)
Weight
(lbs.)
4.50
3-1/2 API reg
Pipe
0.37
25.0
3.50
Pin Only
4.00
412
4.50
3-1/2 API reg
Starter Pipe
0.625
21.6
3.50
Both Ends
No
597
5.50
4 FH
Pipe
0.415
25.0
4.50
Both Ends
5.00
733
7.62
4-1/2 Beco
Pipe
0.500
20.0
6.00
Both Ends
6.50
923
7.62
4-1/2 Beco
Pipe
0.500
30.0
6.00
Both Ends
6.50
1,297
7.62
4-1/2 Beco
Pipe
0.500
25.0
6.00
Both Ends
6.50
1,110
7.62
5-1/4 Beco
Pipe
0.750
8.0
6.75
Both Ends
No
626
7.62
5-1/4 Beco
Starter Pipe
0.750
25.0
6.75
Both Ends
No
1,524

Inch to mm conversion chart

Traditional Rig Application: PV-351

Top of list

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box
Component
Wall Thickness (inch)
Length
(feet)
inch
flat location
Hex
(inch)
Weight (lbs.)
7.62
5-1/4 Beco
Pipe
2.000
35.0
6.62
Both Ends
No
3,830
8.62
6 Beco
Pipe
2.000
35.0
7.75
Both Ends
No
4,996
10.75
8 Beco
Pipe
1.000
35.0
9.25
Both Ends
No
4,511
12.75
8 Beco
Pipe
1.000
35.0
10.50
Both Ends
No
5,026
13.38
10 Beco
Pipe
1.000
35.0
11.38
Both Ends
No
5,264

Inch to mm conversion chart

Traditional Rig Application: T2, T3, TH60/75E/100A

Top of list

 
Wrench Flats
 
Diameter (inch)
Thread Pin/Box
Component
Wall Thickness (inch)
Length
(feet)
inch
flat location
Hex
(inch)
Weight (lbs.)
3.50
2-3/8 IF
Pipe
0.368
20.0
2.75
Box Only
No
229
4.50
2-7/8 IF
Pipe
0.337
20.0
3.50
Box Only
No
344
4.50
3-1/2 API reg
Pipe
0.337
20.0
3.50
Box Only
No
344

Inch to mm conversion chart

Traditional Rig Application: Atlas Copco Simba Rig

Top of list

Diameter
(inch)
Thread Pin/Box
Wall Thickness
(inch)
Length
(feet)
Circulation Grip (inch)
Weight
(lbs.)
3.50
2-3/8 API reg
1/6
6.15
2-3/8
57
4.50
3-1/2 API reg
1/4
6.15
3-3/4
104

Inch to mm conversion chart

Traditional Rig Application: Atlas Copco ROC F6/L6/L8

Top of list

Standard Lengths
Diameter (inch)
Thread
Pin/Box
Wall Thickness
(inch)
Length (feet)
Wrench Flats
Weight
(lbs.)
ROC F6 = 4.0m
3
2-3/8 API reg
1/4
13.12
No wrench flats
106
ROC L8 = 6.0m
3
2-3/8 API reg
1/4
16.40
No wrench flats
128
ROC 830 = 4.0m
ROC 860 = 5.0m
3-1/2
2-3/8 API reg
1/4
13.12
No wrench flats
133
ROC 936 = 6.0m
3-1/2
2-3/8 API reg
1/4
16.40
No wrench flats
164
ROC F6 = 4.0m
3-1/2
2-3/8 API reg
1/4
19.68
No wrench flats
184
ROC L6 = 5.0m or 4m
(check configuration
of the rig)
3-1/2
2-3/8 API reg
1/3
19.68
No wrench flats
280
ROC L8 = 6.0m
4
2-7/8 API reg
1/4
13.12
No wrench flats

152
ROC 830 = 4.0m
4
2-7/8 API reg
1/4
16.40
No wrench flats
197
ROC 860 = 5.0m
4
2-7/8 API reg
1/4
19.68
No wrench flats
232
ROC 936 = 6.0m
4-1/2
3-1/2 API reg
1/4
19.68
No wrench flats
254
4-1/2
3-1/2 API reg
1/3
19.68
No wrench flats
350
5-1/2
4-1/2 API reg
1/3
19.68
No wrench flats
442

Inch to mm conversion chart

Traditional Rig Application: Various Rig Applications

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Wrench Flats
Diameter
(inch)
Thread
Pin/Box
Wall Thickness
(inch)
Length
(feet)
inch
flat location
Weight
(lbs.)
2-3/8
RD 50-6
1/6
9.8
2-1/6
Both Ends
51
 
3
RD 50-6
1/6
4.9
2-5/8
Both Ends
35
3
RD 50-6
1/6
6.6
2-5/8
Both Ends
42
3
RD 50-6
1/6
9.8
2-5/8
Both Ends
57
3
2-3/8 API reg
1/6
3.3
2-5/8
Both Ends
24
3
2-3/8 API reg
1/6
4.9
2-5/8
Both Ends
33
3
2-3/8 API reg
1/6
6.6
2-5/8
Both Ends
40
3
2-3/8 API reg
1/6
9.8
2-5/8
Both Ends
55
3
2-3/8 API reg
1/4
3.3
2-5/8
Both Ends
31
3
2-3/8 API reg
1/4
4.9
2-5/8
Both Ends
44
3
2-3/8 API reg
1/4
6.6
2-5/8
Both Ends
55
3
2-3/8 API reg
1/4
9.8
2-5/8
Both Ends
79
3-1/2
2-3/8 API reg
1/6
3.3
2-5/8
Both Ends
31
3-1/2
2-3/8 API reg
1/6
4.9
2-5/8
Both Ends
40
3-1/2
2-3/8 API reg
1/6
6.6
2-5/8
Both Ends
51
3-1/2
2-3/8 API reg
1/6
9.8
2-5/8
Both Ends
68
3-1/2
2-3/8 API reg
1/4
3.3
2-5/8
Both Ends
37
3-1/2
2-3/8 API reg
1/4
4.9
2-5/8
Both Ends
53
3-1/2
2-3/8 API reg
1/4
6.6
2-5/8
Both Ends
66
3-1/2
2-3/8 API reg
1/4
9.8
2-5/8
Both Ends
95
3-1/2
2-7/8 API reg
1/4
9.8
2-5/8
Both Ends
95
4
2-7/8 API reg
1/4
9.8
3
Both Ends
115
4-1/2
3-1/2 API reg
1/6
9.8
3-3/4
Both Ends
101
4-1/2
3-1/2 API reg
1/4
3.3
3-3/4
Both Ends
59
4-1/2
3-1/2 API reg
1/4
4.9
3-3/4
Both Ends
77
4-1/2
3-1/2 API reg
1/4
6.6
3-3/4
Both Ends
97
4-1/2
3-1/2 API reg
1/4
9.8
3-3/4
Both Ends
132
4-1/2
3-1/2 API reg
1/4
14.8
3-3/4
Both Ends
189
4-1/2
3-1/2 API reg
1/4
19.7
3-3/4
Both Ends
244
4-1/2
3-1/2 API reg
1/3
3.3
3-3/4
Both Ends
65
4-1/2
3-1/2 API reg
1/3
6.6
3-3/4
Both Ends
119
4-1/2
3-1/2 API reg
1/3
9.8
3-3/4
Both Ends
170
4-1/2
3-1/2 API reg
1/3
19.7
3-3/4
Both Ends
295
 
3-1/2
2-3/8 IF
1/4
6.6
2-5/8
Both Ends
68
3-1/2
2-3/8 IF
1/6
9.8
2-5/8
Both Ends
68
4-1/2
2-7/8 IF
1/4
19.7
3-3/4
Both Ends
247

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Inch to mm conversion chart

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