In power hydraulics, pneumatics and industrial installations, it is very important to tightly close technological openings and threaded channels.

For this purpose, the following applies: DIN threaded plugs, which differ in design, tightening method and application.

The most common plugs are those that comply with the following standards:

• DIN 906
• DIN 908
• DIN 909
• DIN 910

Although they are all used to close threaded holes, their construction is different.

Threaded plugs according to DIN standards

The most important differences between the standards:

• DIN 906 – plug with Allen socket,
• DIN 908 – flange plug with Allen socket,
• DIN 909 – hexagonal head plug,
• DIN 910 – plug with hexagonal flange head.

The selection depends mainly on:

• available space,
• required tightening torque,
• tightness of the connection,
• how to service the installation.

What is DIN 906 cork?

DIN 906 is a threaded plug with an internal hexagonal socket (Allen).

Key features:

• compact design,
• possibility of installation in limited space,
• flat surface after assembly.

DIN 906 plugs are often used in:

• power hydraulics,
• machine bodies,
• oil systems.

Check detailed information and dimension table on the product page. DIN 906

What is DIN 908 cork?

DIN 908 is a flanged plug with an Allen socket.

Compared to DIN 906 it has:

• additional collar,
• larger pressure surface,
• better pressure distribution.

This ensures higher tightness of the connection.

Check detailed information and dimension table on the product page. DIN 908

What is DIN 909 cork?

DIN 909 is a plug with an external hexagonal head.

Key features:

• possibility of tightening with a standard wrench,
• easy assembly and disassembly,
• possibility of obtaining higher tightening torque.

This solution is often used in applications requiring regular servicing.

Check detailed information and dimension table on the product page. DIN 909

What is DIN 910 cork?

DIN 910 is a plug with a hexagonal flanged head.

Key features:

• external hexagonal head,
• additional flange increasing the pressure surface,
• improved connection tightness.

DIN 910 combines the advantages of:

• easy to tighten,
• high tightness.

Check detailed information and dimension table on the product page. DIN 910

The most important differences between DIN 906, DIN 908, DIN 909 and DIN 910

Where are DIN plugs used?

Threaded plugs are used in many industrial sectors.

They are most often used in:

• power hydraulics,
• pneumatics,
• gears and reducers,
• oil tanks,
• machine bodies,
• pumps and valves.

Their task is to tightly close technological openings.

Protective materials and coatings

DIN plugs can be made of various materials.

The most common variants:

• carbon steel,
• galvanized steel,
• A2 stainless steel,
• A4 stainless steel,
• brass.

The choice of material depends on:

• type of medium,
• operating temperatures,
• pressure,
• working environment.

How to choose the right cork?

When choosing a cork, it is worth considering:

• thread type,
• required tightening torque,
• availability of space for the tool,
• tightness requirements,
• service frequency.

When to use DIN 906, DIN 908, DIN 909 or DIN 910?

DIN 906

The best choice when:

• installation space is limited,
• a flat finish is needed.

DIN 908

The best choice when:

• better tightness is required,
• a larger pressure surface is needed.

DIN 909

The best choice when:

• quick assembly and disassembly is needed,
• standard keys are used.

DIN 910

The best choice when:

• high tightening torque is required,
• the connection must be additionally sealed.