DIN3017 German Eccentric Stainless Steel Hose Clamp – 9mm Side Riveted Worm Drive Clip

A: The key difference is the asymmetric connection sleeve. On a universal worm clamp, tightening force can concentrate unevenly and sometimes tilt the housing, which digs into the hose. The German eccentric design uses a short, offset sleeve and a convex arc structure to pull the band down evenly. This keeps the clamping ring level, so you get a uniform seal without pinching the rubber. In practical terms, that means fewer cold leaks and a lower chance of damaging silicone or rubber hoses during installation.

A: DIN3017 is the German standard that defines dimensions, materials, and performance for hose clamps with a worm gear drive. A clamp marked DIN3017 Germany Type is manufactured to meet those specifications for band width, housing design, and tightening torque. If you’re replacing a European vehicle’s factory clip or spec’ing parts for an industrial build, choosing a DIN3017 compliant clamp gives you predictable fitment and proven sealing integrity.

A: Both are stainless steel hose clamp materials, but they serve slightly different priorities.

SS304 offers better corrosion resistance and is the go-to for humid, mildly corrosive, or outdoor environments.

SS430 provides higher tensile strength and slightly more resistance to certain types of stress, while still being magnetic and more cost-effective in dry or interior applications.
If you’re working on a turbo pipe, cooling system, or under-hood spot where moisture is expected, SS304 is the safer long-term pick.

A: Measure the outer diameter of your hose when it’s fully seated on the fitting. Then choose a clamp whose clamping range (shown in the size chart) captures that measurement comfortably—ideally toward the middle of the range. For example, if your hose measures 35 mm OD, a 32–50 mm clip gives you plenty of adjustment without ending up at the very end of the band’s travel. All our stainless hose clamps list the adjustment range clearly, so you don’t have to guess.