Graco 1/4 in. Female X 1/4 in. Male, Union Swivel, 1 Pack

Airless paint sprayer house fitting- 1/4 in np t(m) x 1/4 in npsm (f) (6.4 mm x 6.4 mm). For use in connection two standard sirless paint sprayer hoses together. 

Male Thread Type is an NPT. NPT has a tapered male and female thread which seals with Teflon tape or jointing compound. Female Thread Type is a NPSM. NPSM – American National Standard Pipe Straight Mechanical Joint thread. This type creates a non-pressure tight connection in applications that are not subject to internal pressures.