Metric Pipe Plugs | McMaster-Carr

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326 Products

Pipe and Pipe Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

Compact Extreme-Pressure
Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces.

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these corrosion-resistant fittings in a low-pressure pipe line.

High-Pressure Stainless
Steel Threaded Pipe Fittings

Use these heavy duty, corrosion-resistant fittings in high-pressure flow applications.

Extreme-Pressure Stainless
Steel Threaded Pipe Fittings

Use these fittings in extreme-pressure conditions up to 15,000 psi.

High-Pressure Brass Threaded Pipe Fittings

These brass fittings have the strength to handle high-pressure applications.

High-Pressure Plated Brass Threaded Pipe Fittings

The plating on these brass fittings creates a shiny finish and provides extra protection in corrosive environments. Fittings have the strength to handle high-pressure applications.

Low-Pressure Plated Brass Threaded Pipe Fittings

Used in low-pressure pipe lines, these brass fittings have a plating that makes them shiny and improves corrosion resistance.

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications.

Medium-Pressure Aluminum Threaded Pipe Fittings

Designed for medium-pressure applications, these fittings have better strength than our low-pressure aluminum pipe fittings.

Plastic Pipe Fittings for Gasoline

Use these plastic fittings to connect gasoline fuel lines to machines and equipment. They have excellent corrosion resistance as well as high strength and impact resistance.

Plastic Pipe Fittings for Oil

Made of corrosion-resistant plastic, these fittings won’t deteriorate when used in oil applications. They have high strength and impact resistance.

International Standard ISO Minimal-Spill
Quick-Disconnect Hose Couplings for Hydraulic Fluid

International Standard ISO
Minimal-Spill Quick-Disconnect
Hose Couplings for Hydraulic Fluid

Use these couplings at pressures up to 7,200 psi. Also known as flush-face couplings, the plugs and sockets have a flat face, which allows them to mate close together, reducing fluid loss when connecting and disconnecting the line. They are compatible with International Standard ISO Minimal-Spill-shape plugs and sockets.

Pressure Test Fittings

Check pressure without permanently installing a gauge.

Threaded Round Plugs for Straight-Thread Pipe

Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.

Grease Fittings

Grease Fitting Adapters

When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.

Grease Fittings

Thread these fittings into motors, bearings, engine blocks, and other machinery to create a lubrication point.

Grease Fitting Assortments

Keep a variety of grease fitting shapes, styles, and sizes on hand.

Flush-Style Grease Fittings

The nipple doesn't stick out, so these fittings fit in tight spaces and won't be damaged if something knocks into them.

Button-Head Grease Fittings

Often used on earth movers, mining equipment, and other heavy machinery, these fittings have a T-shaped top that holds the dispensing tip in place so it won't pop off when adding grease.

Self-Tapping Grease Fittings for Unthreaded Holes

To fit securely in unthreaded holes, these fittings cut threads as they’re installed.

Self-Tapping Flush-Style Grease
Fittings for Unthreaded Holes

Ensure a secure fit in unthreaded holes—these fittings cut threads as they’re installed. Use these fittings in tight spaces where protruding fittings won't work.

Pipe and Pipe Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Compact Extreme-PressureSteel Threaded Pipe Fittings

Low-Pressure Stainless Steel Threaded Pipe Fittings

High-Pressure StainlessSteel Threaded Pipe Fittings

Extreme-Pressure StainlessSteel Threaded Pipe Fittings

High-Pressure Brass Threaded Pipe Fittings

High-Pressure Plated Brass Threaded Pipe Fittings

Low-Pressure Plated Brass Threaded Pipe Fittings

Low-Pressure Aluminum Threaded Pipe Fittings

Medium-Pressure Aluminum Threaded Pipe Fittings

Plastic Pipe Fittings for Gasoline

Plastic Pipe Fittings for Oil

International Standard ISO Minimal-SpillQuick-Disconnect Hose Couplings for Hydraulic Fluid

International Standard ISOMinimal-Spill Quick-Disconnect Hose Couplings for Hydraulic Fluid

Pressure Test Fittings

Pressure Test Fittings

Threaded Round Plugs for Straight-Thread Pipe

Threaded Round Plugs for Straight-Thread Pipe

Grease Fittings

Grease Fitting Adapters

Grease Fittings

Grease Fitting Assortments

Flush-Style Grease Fittings

Button-Head Grease Fittings

Self-Tapping Grease Fittings for Unthreaded Holes

Self-Tapping Flush-Style GreaseFittings for Unthreaded Holes

Compact Extreme-Pressure
Steel Threaded Pipe Fittings

High-Pressure Stainless
Steel Threaded Pipe Fittings

Extreme-Pressure Stainless
Steel Threaded Pipe Fittings

International Standard ISO Minimal-Spill
Quick-Disconnect Hose Couplings for Hydraulic Fluid

International Standard ISO
Minimal-Spill Quick-Disconnect
Hose Couplings for Hydraulic Fluid

Self-Tapping Flush-Style Grease
Fittings for Unthreaded Holes