Eaton Weatherhead 40X4 Brass CA360 SAE 45 Degree Flare, Cap, 1/4" Tube OD (Pack of 5) Cap fitting for closing the end of a male-threaded flare tube Female 7/16-20 SAE flare threads for use with 1/4" OD tubes CA360 brass for strength and resistance to corrosion Operating temperature range of -65 to +250 degrees F (-53 to +121 degrees C)