Bottoming Taps | McMaster-Carr

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1,236 Products

Internal Thread Cutting

General Purpose Taps

Cut threads into most metal and plastic.

Long-Reach General Purpose Taps

Use the extra-long shank to thread deep and hard-to-reach holes.

Left-Hand General Purpose Taps

Tap threads for left-hand threaded fasteners.

Economy Carbon Steel Taps

Often used for thread repair and occasional hand tapping, these carbon steel taps can thread holes in most metal and plastic, but they have a shorter tool life than standard taps.

Carbide Taps

Use these taps on hard and abrasive material, such as heat-treated metal, nickel, and fiberglass.

Chip-Clearing Taps for Closed-End Holes

The spiral flute design pulls chips back toward the tap, so chips won't accumulate in closed-end holes.

Chip-Free Forming Taps

Also known as cold-forming and fluteless taps, these press threads into material without cutting it, so no chips are created.

Taps with Two Threading Ends

With a taper chamfer and bottoming chamfer at opposite ends, these taps start threads easily and are good for threading close to the bottom of closed-end holes.

Taps for Steel and Stainless Steel

These taps are made of cobalt steel for higher strength and wear resistance than standard taps. Their flutes are designed to keep chips clear, so they don't need to be reversed to prevent buildup.

Taps for Aluminum, Brass, and Plastic

Coated with chromium carbide or titanium carbonitride (TiCN), these cobalt steel taps cut smoothly through soft material to produce accurate threads.

Pipe and Conduit Thread Taps

Create threads sized for pipe and conduit.

Long-Reach Pipe and Conduit Thread Taps

With an extra-long shank, these taps have extended reach for tapping deep and hard-to-reach areas in pipe and conduit.

Pipe and Conduit Thread Taps for Shallow Holes

Also known as short-projection taps, these have fewer tapered threads at the tip than standard pipe taps, so you don't have to drive them as deep to produce full threads.

Pipe and Conduit Thread Taps
with Two Threading Ends

With a taper chamfer on one threading end and a bottoming chamfer on the other, these pipe and conduit taps can start threads easily, and they are able to thread close to the bottom of closed-end holes.

Pipe and Conduit Thread Taps
for Stainless Steel and Plastic

The spiral flutes on these pipe and conduit taps keep chips clear by drawing them back out of the hole, so there's no need to reverse the tap while cutting threads.

JIS Thread Taps

Produce metric threads that meet Japanese Industrial Standards.

Taps for Helical Inserts

Add threads to holes in preparation for installing helical inserts.

Garden Hose Thread Taps

Tap the unique size needed for garden hose thread (GHT) connections.

Compressed Gas Thread Taps

Also known as National Gas Outlet (NGO) taps, these tap threads in sizes used for compressed gas cylinders and valves.

Spark Plug Thread Taps

Use these high-speed steel taps to cut and repair threads in the sizes needed to accept spark plugs.

Internal Threading Sets

Tap Sets

These taps are for use on most metal and plastic.

Left-Hand Tap Sets

For start-to-finish tapping of left-hand threads, these sets include one taper-, one plug-, and one bottoming-chamfer tap.

Pipe and Conduit Tap Sets

Create pipe and conduit threads in a range of hole diameters.

Tap and Drill Bit Sets

Drill and tap a variety of hole sizes. These taps and drill bits are for use on metal and plastic.