NPT Male Internal Hex Thread Pipe Plug Socket

The inventory NPT Male Internal Hex Thread Pipe Plug Socket of Xiaoguo® are of the internal hexagonal shape. At the work site, they can be installed and disassembled simply by using an ordinary internal hexagonal wrench, making them highly suitable for working environments with limited space.

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Product Description

The NPT Male Internal Hex Thread Pipe Plug Socket is a metal plug with NPT (National Pipe Thread) American standard tapered pipe threads on its outer surface. It has an internal hexagonal groove on its head and is specifically designed for permanently or long-term sealing of pipe interface.

Core feature

（1）Male NPT

Using a 60-degree tooth angle and a 1:16 pipe taper, mechanical sealing force is provided. During the tightening operation, the thread of the NPT Male Internal Hex Thread Pipe Plug Socket will slightly deform to fill the gap. Generally, we recommend using thread sealant or tape when using it.

（2）Internal Hex

The internal hexagonal countersunk design enables the surface of the NPT Male Internal Hex Thread Pipe Plug Socket to be flush with the installation plane, thus saving space. During operation, the internal hexagonal head is less likely to slip during installation, making it much more convenient to operate in narrow spaces such as hydraulic systems and engineering vehicles.

（3）Material

Stainless steel (304/316): Excellent rust prevention properties, suitable for humid environments such as those in the chemical, food, and shipping industries.

Carbon steel: It is relatively cost-effective and has high strength. Its surface is usually galvanized or blackened to prevent rust.

Bronze: It is resistant to corrosion and does not produce sparks, and is commonly used in pneumatic systems and water pipelines.

< style="text-align:center;"> NPT Male Internal Hex Thread Pipe Plug Socket

Thread	OD(Inch)	OD(mm)	Height	Hexagon Diameter
NPT1/8	13/32≈3/8	10.287mm	0.31"/8mm	0.19"/5mm
NPT1/4	33/64≈1/2	13.000mm	0.39"/10mm	0.23"/6mm
NPT 3/8	43/64≈5/8	17.145mm	0.43"/11mm	0.31"/8mm
NPT1/2	27/32≈3/4	20.500mm	0.59"/15mm	0.39"/10mm

FAQ

（1）What standards does this NPT Male Internal Hex Thread Pipe Plug Socket comply with?

Produced strictly in accordance with the ASME/ANSI B1.20.1 standard, the thread accuracy and dimensions meet the requirements of the American standard NPT tapered pipe thread.

（2）What thread sizes are available?

Common specifications range from 1/8″ NPT to 2″ NPT. Custom non-standard sizes or special pitches can also be provided.

（3）What is the temperature range?

The material of the body (carbon steel / stainless steel) can withstand temperatures ranging from -40°C to +150°C. When combined with PTFE tape or high-temperature sealant, it can be extended to -54°C to +250°C.