✅ G1/2" Pipe fittings female Thread Water Pipe to 1/2" NPT Adapter. 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. ✅ British BSPP 1/2" (G) female to NPT 1/2" male pipe fitting converter (Brass) ✅ Lead - Free Adapter. Material : Brass ✅ "G thread female" means that the female part of the adapter is G thread. ✅ Size : 1/2" Female G ,1/2 " Male NPT. Lifetime Warranty