Mounting materials.
See below an overview of the quality markings for hose clamps:
W1 | All parts made of galvanized steel |
W2 | Band + housing made of chrome steel AISI 430; galvanized steel screw (or bolt) |
W3 | All parts of chrome steel AISI 430 |
W4 | All stainless steel parts - A2 stainless steel - AISI / 304 stainless steel |
W5 | All stainless steel parts - stainless steel A4 - AISI / stainless steel 316 |