Technical Information
TopThread ™
API Thread Forms • Insert Applications Chart for API Rotary Shouldered Connections
thread form
V-. 038R 2 " TPF 4 TPI
V-. 038R 3 " TPF 4 TPI
V-. 050 2 " TPF 4 TPI
V-. 050 3 " TPF 4 TPI
V-. 040 3 " TPF 5 TPI cresting
NDC-4038R / L2 4-E / IR4API382
NDC-4038R / L3 4-E / IR4API383
NDC-4050R / L2 4-E / IRAPI502
NDC-4050R / L3 4-E / IR4API503
NDC-3040R / L3 NDC-4040R / L3 4-E / IR5API403
WIDIA ™ insert non-cresting
ND-3038R / L tool joint application
2-3 / 8 API internal flush 2-7 / 8 API internal flush 3-1 / 2 API internal flush 4 API internal flush 4-1 / 2 API internal flush 5-1 / 2 API internal flush 6-5 / 8 API internal flush 4 API full hole API # 23, API # 26, API # 31, API # 35, API # 38, API # 40, API # 44, API # 46, API # 50
ND-3038R / L API # 56 API # 61 API # 70 API # 77
ND-4050R / L
ND-4050R / L
ND-3040R / L ND-4040R / L
5-1 / 2 API full hole 6-5 / 8 API regular 6-5 / 8 API full hole
5-1 / 2 API regular 7-5 / 8 API regular 8-5 / 8 API regular
2-3 / 8 API regular 2-7 / 8 API regular 3-1 / 2 API regular 4-1 / 2 API regular minimum box size *
API # 31 2-7 / 8 IF
API # 56
5-1 / 2 API full hole
5-1 / 2 API regular
3-1 / 2 API regular
* Minimum box size that can be threaded with a standard TopThread insert due to minimum bore equipment.
API Thread Forms Product Thread Dimensions • Rotary Shouldered Connections( Inch)
threadform |
taper inch per ft. |
thread height, not truncated H |
thread height, truncated h n = h s |
root truncation S m = S rs f m = f rs |
crest truncation f cn = f cs |
crest f cn = f cs
width of flat
crest f m = f rs
|
root radius r m = r rs |
radius at thread corners r |
pitch p |
V-. 038R V-. 038R V-. 040 V-. 050 V-. 050 |
2 3 3 3 2 |
. 216005. 215379. 172303. 215379. 216005 |
. 121844. 121381. 117842. 147303. 147804 |
. 038000. 038000. 020000. 025000. 025000 |
. 056161. 055998. 034461. 043076. 043201 |
. 065. 065. 040. 050. 050 |
————— |
. 038. 038. 020. 025. 025 |
. 015. 015. 015. 015. 015 |
. 250
. 250
. 250
|
NOTE: All dimensions in inches.
V-. 040 and V-. 050 Product Thread Form Casing and Tubing Round Thread( Height Dimensions)
S m |
box |
p |
taper shown exaggerated |
thread element |
10 TPI p =. 1000 |
8 TPI p =. 1250 |
|
F94
H
|
h n
f cn
axis of thread
|
r
f cn
pin
|
30 º
60 º
m
r
90 º
f cs 30 º
r rs
|
f cs
h s
S rs
|
H |
=. 866p |
. 08660 |
. 10825 |
H s = h n |
=. 626p-. 007 |
. 05560 |
. 07125 |
S rs = S m |
=. 120p +. 002 |
. 01400 |
. 01700 |
S cs = S cn |
=. 120p +. 005 |
. 01700 |
. 02000 |
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