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Acme / Stub Acme Thread Spec

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blckwtr

blckwtr

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For large diameter threads such as 6" and up, is there a norm for TPI on these diameters? Which TPI gives the greater strength?
 
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My googling has netted me very little to answer your question. I've seen one company ( selling a 6" diameter thread (1.5" TPI) but I don't know that it is a "norm". Otherwise I see nothing but 5" at the upper end elsewhere.

If it's specified anywhere, I'd imagine it's in ASME B1.5 which I don't have, sorry.
 
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OK. thank's anyway...;) I guess I just base it on premium threads like Vam Top or similar in that dimension...
 
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