API Screw Thread Gages

TBG Screw Threads for American Petroleum Institute-API

Go Directly to the Gage Price Sheets

External Upset Tubing (EU, EUE)  API SPEC 5B
Working Ring or Working Plug
Size  (in Inches)	T.P.I.  (Threads per Inch)	T.P.F.  (Taper per Foot)
1.0500	10	3/4
1.3150	10	3/4
1.6600	10	3/4
1.9000	10	3/4
2-3/8	8	3/4
2-7/8	8	3/4
3-1/2	8	3/4
4	8	3/4
4-1/2	8	3/4

 

Return to the Main API Index Home Page

Original Posting: 08/24/2011
Last Revision: 6/11/2012
Error corrections in or comments about the above data can be sent to: office@gagecrib.com