✅ G Thread is Parallel (straight) threads (BSPP - British Standard Pipe Parallel), which have a constant diameter. The NPT thread is slightly tapered, while the G connection is straight. No Washer Needed. ✅ G3/8" Pipe fittings female Thread Water Pipe to 3/8" NPT Adapter ✅ British BSPP 3/8" (G) female to NPT 3/8" male pipe fitting converter (Brass) ✅ Lead - Free Adapter. Material: Brass ✅ Maximum Working Pressure up to 230 psi with temperature ranging from -65°F to +250°F (-53°C to +121°C) ✅ Size : 3/8" Female G ,3/8" Male NPT. Lifetime Warranty This water connection fittings for ease of use. Which can convert G thread connector to NPT connector It is made of durable Lead Free Brass, with threads that are manufactured to the highest quality standards. Choosing this adapter ensures that you've chosen a high quality item for your project. It is easy to install for both homeowners and contractors.Package: 2 pieces of 3/8" FG to 3/8" MNPT Adapters