Pipe Nipples and Thread Types: A Guide to the Basics

Today we will learn about pipe nipples in very easy words. A pipe nipple is just a short piece of pipe with threads on one or both ends. It helps connect two pipes or fittings together quickly.

What Are the Main Types of Pipe Nipples?

1. Close Nipple – Threads on both ends, almost no space in the middle.

2. Short Nipple – A little longer than close nipple.

3. Barrel Nipple – Long and straight, good for joining far pipes.

4. Hex Nipple – Has six flat sides so you can use a wrench easily.

5. King Nipple – One side has hose barb, the other side has threads (great for garden hoses).

6. Weld Nipple – No threads, you weld it instead.

Common Materials

• Brass – yellow color, never rusts, perfect for water.

• Stainless Steel – very strong, good for chemicals and outdoor.

• Black Steel / Carbon Steel – cheap and strong, mostly for gas or oil.

• Galvanized – coated to stop rust, used outside.

• PVC / PVC – plastic, light and cheap for cold water.

Most Popular Thread Types (Very Important!)

Thread Name	Shape	Where Used	Sealing Method
NPT	Tapered	USA, water, gas, oil	Needs tape or paste
NPSM	Straight	Swivel fittings	Uses washer
BSPT	Tapered	UK, Europe, Australia	Needs tape or paste
BSPP	Straight	Europe	Uses O-ring or washer

Remember: NPT and BSPT look almost same but do NOT fit together!

Quick Size & Length Tips

• Sizes start from ⅛ inch up to 6 inch or more.

• Standard lengths: close, 2", 3", 4", 6", 8", 12".

• Always measure from end to end of threads.

Simple Buying Advice

When you need many pieces with perfect threads and no leaks, choose a trusted plumbing pipe nipples manufacturer. Good factories make them smooth, strong, and exactly the right size every time.

Now you know the basics of pipe nipples and threads! Next time you go to the hardware store or order online, you will pick the correct one without any problem.