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API Screw Thread Gages

TBG Screw Threads for American Petroleum Institute-API

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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

 

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

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