I'm installing a freestanding tub faucet. According to the manufacturer's spec sheet the supply lines have 1/2 inch female NPSM threads, which I believe is a straight thread. I'm trying to attach these to 1/2 inch PEX-B. All of the male thread PEX fittings that I can find have MIP or MNPT threads, which I believe is a tapered thread.
Will the male MIP or MNPT be able to screw securely into a female NPSM? If not, then where would I find a fitting that would allow me to make this connection? Thank you.