
Stainless Steel Worm Drive Hose Clamp DIN 3017 SAE J1508 W1-W5 8-160mm. Wrong material code is the number one cause of clamp failures. W1 to W5 are material codes, not quality grades - they show what the band, housing and screw are each made of. We produce to the code you. A 304 clamp will not survive permanent seawater immersion. Chloride pitting and crevice corrosion usually appear within months to a year. For seawater, marine decks, chemical plants and food processin. Perforated bands can cut soft silicone hoses. The punched holes extrude and nibble the hose wall under high torque, which ends in leaks. For silicone, EPDM and thin-wall hose we supply smooth non-perf. Over-torquing destroys the joint as fast as under-torquing. Industry practice is to stay at 50%-70% of the rated breaking torque: typical installation torque is 2.5-3.5 N.m for a 9 mm band on rubber h. Standards are not interchangeable, so we build to your market. DIN 3017-1 Type A metric sizes with a 7 mm hex socket screw, and American type 12.7 mm (1/2 inch) perforated band with a 5/16 inch (7.9 m. Full coverage instead of partial shipments. Metric clamping range 8 mm to 160 mm, plus SAE sizes from #6 (11-20 mm) to #104 (157-178 mm), with band widths 8 / 9 / 12 / 12.7 mm and band thickness 0.6-0. Receiving inspection needs paperwork. Material test certificates with traceability (MTR), dimensional and torque test reports, and neutral salt spray reports per ISO 9227 arranged to the duration and. Environmental compliance is documented, not assumed. All clamps are chromium VI free and comply with RoHS, WEEE and ELV requirements; stainless parts are supplied natural with passivation or polishing. Honest engineering advice: for high pressure, high temperature or strong vibration service, a perforated worm drive clamp is the wrong product - a T-bolt clamp or constant tension clamp is the safe an.