API Thread Forms • Insert Applications Chart for API Rotary Shouldered Connections

WIDIA insert

threadtool jointminimum
formcrestingnon-crestingapplicationbox size*

2-3/8 API internal fl ush 2-7/8 API internal fl ush 3-1/2 API internal fl ush 4 API internal fl ush V-.038R 4-1/2 API internal fl ush NDC-4038R/L2 API #31

2" TPF ND-3038R/L 5-1/2 API internal fl ush

4-E/IR4API382 2-7/8 IF 4 TPI 6-5/8 API internal fl ush 4 API full hole API #23, API #26, API #31, API #35, API #38, API #40, API #44, API #46, API #50

V-.038RNDC-4038R/L3ND-3038R/LAPI #56API #56
3" TPF4-E/IR4API383API #61

4 TPI API #70 API #77 V-.050 5-1/2 API full hole NDC-4050R/L2

2" TPF ND-4050R/L 6-5/8 API regular 5-1/2 API full hole

4-E/IRAPI502 4 TPI 6-5/8 API full hole V-.050 5-1/2 API regular NDC-4050R/L3

3" TPF ND-4050R/L 7-5/8 API regular 5-1/2 API regular

4-E/IR4API503 4 TPI 8-5/8 API regular 2-3/8 API regular V-.040 NDC-3040R/L3 ND-3040R/L 2-7/8 API regular

3" TPF NDC-4040R/L3 3-1/2 API regular

ND-4040R/L 3-1/2 API regular 5 TPI 4-E/IR5API403 4-1/2 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)

width of fl at thread

thread root radius

height,

height, truncation crest root at thread

not

taper inch truncated Sm=Srs truncation crest crest radius corners pitch

truncated

threadform per ft. hn=hs fm=frs fcn=fcs fcn=fcs fm=frs rm=rrs r p

H .250

V-.038R2.216005.121844.038000.056161.065.038.015
V-.038R3.215379.121381.038000.055998.065.038.015
V-.0403.172303.117842.020000.034461.040.020.015.250
V-.0503.215379.147303.025000.043076.050.025.015
V-.0502.216005.147804.025000.043201.050.025.015

.250 NOTE: All dimensions in inches.

V-.040 and V-.050 Product Thread Form Casing and Tubing Round Thread (Height Dimensions) p taper shown

Sm exaggerated 10 TPI 8 TPI

box

thread elementp= .1000p= .1250
fcsH= .866p.08660.10825
mHs = hn= .626p - .007.05560.07125

hn r

HfcsSrs = Sm= .120p + .002.01400.01700
r 30ºScs = Scn = .120p + .005.01700.02000

30º rrs hs fcn 60º fcn 90º Srs axis of thread pin