Also called Pipe Taps, National Pipe Taper Taps are appropriate for threading a wide variety of materials both ferrous and non-ferrous. Carbon steel
Stainless Steel Compression Fitting Male Connectors - 3/8T x 3/8NPT
Titan USA TT93612S 3/4-14 Thread x 1.3750 (1-3/8) Thread Length x 0.9063 Shank x 3.2500 (3-1/4) OAL Steam Oxide Coated High Speed Steel Interrupted Thread Pipe Tap - All Industrial Tool Supply
Drill America 3/8 in. -18 Carbon Steel NPT Pipe Tap DWTPT3/8 - The Home Depot
Taps - USS - Taps & Dies - Hand Tools - The Home Depot
Pipe Taps Taper Pipe (NPT) - Drillco Cutting Tools
Drill America 3/8 in. - 24 High Speed Steel Left Hand 3-Flute Tap with Spiral Point DWTG3/8-24LH - The Home Depot
Hss and Carbon Steel Npt Taps
Part Number, Taper Pipe Taps - High Speed Steel, Long Shank, Long Screw, LS-PT, YAMAWA
Milwaukee 1/4 in. -18 NPT Straight Flute Taper Tap 49-57-5191 - The Home Depot
Sutton Tools M2441666 Hand Tap 3/8 19TPI Pipe RC Carbon
14 Piece Hi-Carbon Steel Fine Thread Fractional Tap & Hex Die Set (1 Set), Norseman Drill #50080
3/8 Carbon Steel NPT Pipe Tap, 38PT`
Drill America 3/8 in. - 16 High Speed Steel Left Hand 3-Flute Tap with Spiral Point DWTG3/8-16LH - The Home Depot