CGA870 to ¼” NPT Straight Handle This is a CGA870to ¼”NPT Male. This adapter is handy in making up filling systems or for converting regulators over to Medical Bi Pin. This version has a Straight Handle Johns Tip’s: Where is the O-ring Ok you all, this is not scuba so there is no o-ring. We have a fancy item here called a bodock seal. Now if you want to sound important to your buddies throw that at them next time. The Bodock seal actually hooks to the center pin assembly and does the sealing.