A 1/4" Hose Barb x 3/8" NPT Brass (sold each) fitting with a threaded end from Moto Iron® brand.
A 1/4" Hose Barb x 3/8" NPT Brass (sold each) fitting with a threaded end from Moto Iron® brand.
A 1/4" Hose Barb x 3/8" NPT Brass fitting (sold each) that can accommodate a Moto Iron® hose.

1/4" Hose Barb x 3/8" NPT Brass (sold each)