3/4-14 HIGH SPEED STEEL, NPS PIPE TAP. 5-FLUTES. TAPS MARKED NPS ARE SUITABLE FOR TAPPING HOLES, OR COUPLINGS, FOR LOW PRESSURE WORK TO ASSEMBLE WITH TAPER THREADED PIPE PR FITTINGS TO SECURE A TIGHT JOINT WHEN A SEALER ID USED. THEY ARE SUITABLE FOR NPSC AND NPSM WORK.