Technical Information TopThread™ API Thread Forms • Insert Applications Chart for API Rotary Shouldered Connections WIDIA™ insert thread tool joint minimum form cresting non-cresting application box size* 2-3/8 API internal flush 2-7/8 API internal flush 3-1/2 API internal flush 4 API internal flush V-.038R2" TPF4 TPI NDC-4038R/L24-E/IR4API382 ND-3038R/L 4-1/2 API internal flush5-1/2 API internal flush6-5/8 API internal flushAPI #312-7/8 IF 4 API full hole API #23, API #26, API #31, API #35, API #38, API #40, API #44, API #46, API #50 V-.038R NDC-4038R/L3 ND-3038R/L API #56 API #56 3" TPF 4-E/IR4API383 API #61 4 TPI API #70 API #77 V-.0502" TPF4 TPI NDC-4050R/L24-E/IRAPI502 ND-4050R/L 5-1/2 API full hole6-5/8 API regular 5-1/2 API full hole6-5/8 API full hole V-.0503" TPF4 TPI NDC-4050R/L34-E/IR4API503 ND-4050R/L 5-1/2 API regular7-5/8 API regular 5-1/2 API regular8-5/8 API regular V-.0403" TPF5 TPI NDC-3040R/L3NDC-4040R/L34-E/IR5API403ND-3040R/LND-4040R/L 2-3/8 API regular2-7/8 API regular3-1/2 API regular3-1/2 API regular4-1/2 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) taper inchthreadformper ft.threadheight,nottruncatedHthreadheight,truncatedhn=hsroottruncationcrestSm=Srstruncationfm=frsfcn=fcswidth of flatcrestcrestfcn=fcsfm=frsradiusrootat threadradiuscornerspitchrm=rrsrp .250 V-.038R 2 .216005 .121844 .038000 .056161 .065 — .038 .015 V-.038R 3 .215379 .121381 .038000 .055998 .065 — .038 .015 V-.040 3 .172303 .117842 .020000 .034461 .040 — .020 .015 .250 V-.050 3 .215379 .147303 .025000 .043076 .050 — .025 .015 V-.050 2 .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 box exaggerated 10 TPI 8 TPIthread elementp= .1000p= .1250 fcs H = .866p .08660 .10825 H hn mr Hs = hn = .626p - .007 .05560 .07125fcsSrs = Sm= .120p + .002.01400.01700 r 30º30ºrrs Scs = Scn = .120p + .005 .01700hs .02000 fcn fcn 60º axis of thread pin 90º Srs F94 widia.com