Pipe Taps

A pipe tap cuts or restores internal threads specifically sized for pipe fittings (usually NPT or BSP) and typically has tapered threads for sealing; standard taps are often straight-threaded for machine screws or bolts and do not form a pressure-tight seal

Identify the pipe thread standard required (common ones are NPT for U.S. tapered pipe and BSP for British/metric systems) and match the nominal pipe size and taper; consult a thread chart or the fitting you plan to mate to confirm pitch and diameter before buying

High-speed steel (HSS) is common for general-purpose taps; for abrasive or high-wear applications consider HSS with coatings such as TiN or black oxide, and choose carbon steel only for occasional or non-critical use

Buy a set if you need multiple sizes or want cost savings and compatibility in one kit; buy individual taps when you only need a specific size or a higher-grade specialty tap for a particular material or thread standard

You need a compatible tap wrench or machine holder, proper alignment and backing support, and the correct cutting fluid—use general-purpose cutting oil for steel and pipe thread compounds or thread-cutting oils for better sealing surface and reduced wear

Clean chips and residue after use, lightly oil and store taps in a protective case to prevent corrosion and damage to cutting edges, and regrind or replace taps when they show dulling, chipped teeth, or poor thread quality

Pipe taps range from budget options typically under $50 for individual taps or basic sets to higher-cost precision or coated taps above that; higher-priced taps often offer better material, coatings, and tighter manufacturing tolerances