Product Information Material: Steel Seal: Buna-N Select a Product Part NumberThreadThread SizeBody SizeLength 6AGF6-PV-PSFemale NPTF3/4"-143/4" 3AGF3-PV-PSFemale NPTF3/8"- 183/8" 4AGOF5-PV-PSFemale ORB7/8"-141/2"2.66" (66.55mm) 4AGF4-PV-PSFemale NPTF1/2"-141/2"2.62" (66.55mm) 4AGF6-PV-PSFemale NPTF3/4"-141/2"2.74" (69.60mm) 4AGOF4-PV-PSFemale ORB3/4"-161/2"2.62" (66.55mm)