Drag Specialties 1/4 NPT Petcock For Harley These petcocks come with a 1/4 NPT inlet thread. They will fit most British bikes but work very well in custom tanks with 1/4 NPT threaded petcock bung. This petcock comes gloss black with a rear facing outlet. Features Features a three-position switch, on/off/reserve 90 degree rear facing outlet Gloss Black