Nipple 3/8 Steel, Male Thread 3/8-18 NPTFST Series non-valved couplings provide maximum flow and low pressure drop. The smooth, open bore allows easy cleaning in applications where the same lines are used for more than one media.Features• Steel nipples are case hardened for resistance to Brinelling• Functionally interchanges with similar straight-through design couplings• Standard Nitrile seals• Material options availableApplications:• High pressure water• Steam washers• Carpet cleaners