Worm Drive W1 Zinc Coated Hose Clamps Pack of 10 High grade worm drive hose clamps. W1 Mild steel zinc coated. Manufactured to Din 3017 Standards. 12mm Bandwidths. For sealing hoses against loss of liquid, air or gases. Measurement is the Ø diameter of the clip. Maximum recommended torque value 4.0 newton millimetres. For automotive, agriculture, aviation, material Handling, marine, Plant & Construction. Other Clips and clamps available in our shop. The worm drive clamps introduction for general use gave new insights into the measurement of clamping forces both needed and available to prevent leakages. The worm drive has been in engineering applications for many years previously but the use of it in band clamps gave considerable flexibility to range of sizes one clamp could cover together with its ability to offer measured incremental effects. Embossing produces a plain band giving full contact with the clamped surface. Slotting enables slightly higher torque tightening values. They have a wide application in manufacturing industries including: Agriculture Mining & construction Military Boat builders & aircraft Gas & chemical industries Medical equipment Welding equipment Commercial vehicle manufacturers Heating & ventilation Compressed air systems Caravan manufacturers Building & plumbing Plant spray equipment Vending machines