Precision Taper Threading for Tough & Abrasive Materials
Our BSPT solid carbide straight flute pipe taps (also known as RC/PT taper pipe taps) are engineered for high-precision internal pipe threading in abrasive or hard-to-machine materials. These taps conform to British Standard Pipe Taper (BSPT) specifications and are widely used in pressure-tight piping systems and fluid connections.
Crafted from ultra-fine grain solid tungsten carbide, these taps provide exceptional rigidity, wear resistance, and thermal stability, making them ideal for precision tapping of tapered threads in cast iron, alloy steels, aluminum, and non-ferrous metals. The straight flute design ensures effective chip control in short-chipping materials, especially in through-hole applications.
Thread Type: BSPT (British Standard Pipe Taper), RC / PT
Solid Carbide Body: Provides long tool life and consistent performance in tough materials
Straight Flute Geometry: Optimized for through holes and short chip evacuation
Conical Thread Form: Perfectly suited for pressure-sealing pipe threads
Stable Tolerance Control: Maintains dimensional consistency in CNC and manual tapping
Internal pipe threading for hydraulic fittings, fluid connectors, compressed air systems, and pressure lines
Common in automotive, aerospace, machinery, oil & gas, and pneumatic components
Excellent performance in cast iron, copper alloys, mild steels, and aluminum extrusions
Designed for through holes, threaded bosses, and fittings requiring leak-tight connections
Excellent wear resistance in abrasive materials
Accurate tapered thread profile for pressure-sealing joints
Stable chip evacuation in brittle or short-chip materials like cast iron
Designed for high-speed CNC tapping or manual threading applications
Reduces tool changes and downtime in mass production
Ensure proper pre-hole taper size before tapping to achieve sealing performance
Use cutting fluid or MQL for smoother operation and longer tool life
Ideal for through-hole threading—for blind holes or long chips, use spiral taps
Avoid in materials that deform plastically without proper support (e.g., very soft metals)
Thread | P | I | LC | L | D | Z | LK | K |
PT1/16-28 | 0.907 | 2.5P | 16 | 60 | 6 | 4 | 7 | 4.9 |
PT1/8-28 | 0.907 | 2.5P | 18 | 65 | 8 | 4 | 8 | 6 |
PT1/4-19 | 1.337 | 2.5P | 19.5 | 70 | 11 | 4 | 11 | 9 |
PT3/8-19 | 1.337 | 2.5P | 21 | 75 | 14 | 4 | 14 | 11 |
PT1/2-14 | 1.814 | 2.5P | 28 | 80 | 18 | 4 | 17 | 14 |
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