DIN 3017 W4

The DIN 3017 W4 is a specific, high-performance category of worm drive hose clamp defined under the German industrial standard DIN 3017. It is renowned as a "high-torque" or "power" clamp and is considered the most robust and heavy-duty variant within the DIN 3017 series.

The "W4" designation differentiates it from other types in the standard (like the common W2) by its unique, fully enclosed housing design, which is engineered to withstand exceptionally high tightening forces and extreme environments.

Dimension chart: 

Features of DIN 3017 W4 Clamps

Fully Enclosed Metal Housing:

This is the defining feature of the W4 clamp. The entire worm screw mechanism is encased within a stamped and riveted metal shield.

Purpose: This housing acts as an armor, providing immense structural integrity. It prevents the housing from spreading or bursting under very high torque, a common failure point in standard clamps. It also offers excellent mechanical protection for the screw from impact and debris.

Materials:

Band, Housing, and Screw: Typically manufactured entirely from stainless steel.

Common Grades:

A2 (304 Stainless Steel): Offers excellent general corrosion resistance for most industrial and automotive applications.

A4 (316 Stainless Steel): Provides superior resistance to chlorides and acids, making it the mandatory choice for marine, chemical, and offshore applications.

The use of consistent materials prevents galvanic corrosion.

High-Torque Capability:

The reinforced, enclosed housing allows mechanics to apply significantly higher tightening torque with a socket wrench or screwdriver without damaging the clamp. This enables a much greater clamping force and a more secure seal on high-pressure systems.

Common Applications of DIN 3017 W4 Clamps

The DIN 3017 W4 clamp is used in the most demanding applications where failure is not an option:

High-Performance Automotive: Turbocharger and supercharger intercooler pipes, charge air systems, high-pressure oil and fuel lines.

Marine and Shipbuilding: Engine room plumbing, seawater cooling systems, fuel injection lines.

Heavy-Duty Machinery: Hydraulic systems, compressed air systems on industrial compressors and mining equipment.

Chemical and Process Industries: Handling aggressive fluids and gases where leak containment is critical for safety.