Oil Line Hose Nipple 3/8 Inch x 3/8 Inch BSP

Oil line hose nipple 3/8 inch BSP.
 

Used when making connections to central heating flexible oil line hoses, these nipples have special conical shaped ends to make a face to face joint.
 

BSP (British Standard Pipe Thread) sizes don’t match up with what you would measure using a ruler. Have a look at the BSPT link at the bottom of this page for more information about how plumbing threads are measured.