GKDF 42-0.5M/14.75/NPT GKDF 42-0.5M/14.5/NPT GKDF 42-0.3M/14.75/NPT GKDF 42-0.3M/14.5/NPT GKDF 40-6M/14.5/NPT GKDF 40-5M/14.75/NPT GKDF 40-5M/14.5/NPT GKDF 40-4M/14.75/NPT GKDF 40-4M/14.5/NPT GKDF 40-3M/14.75/NPT