1404-16-12 is an adapter connecting 1-11-1/2 male NPTF pipe (SAE J476), 3/4-14 female NPSM pipe swivel. NPSM pipe-swivel end turns on a nut, so you tighten onto a male pipe fitting without rotating line. NPTF pipe end seals on its tapered threads, use sealant or PTFE tape (SAE J476); NPSM pipe-swivel end seats against its mating fitting. Stainless steel for corrosion resistance. Match every end to your ports before ordering. Common uses: hydraulic power units, pneumatic and fuel/oil lines, air and water systems, and machinery plumbing.