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  • Users: lilkitty
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  1. lilkitty

    NPT Threads in Plastic

    I am designing a plastic drain pan with a molded-in 3/4" female NPT (tapered) pipe fitting. Does anyone know if design guides exist for designing the plastic surrounding the threaded hole? Tapered threads can produce extremely high hoop stresses and I don't want the HVAC installer to crack the...

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