WORM GEAR - 1/2″ HY-GEAR® 57-0 1/2″ - Hy-Gear 57-0 is a part stainless general purpose hose clamp suitable for common home and auto applications. Material Specifications: Screw: 5/16″ Hex Head; Plated Carbon Steel - Housing: 200 Stainless - Band: 1/2″; 200 Stainless - Installation Torque: 35 in-lbs (4 Nm) Size: No. 40 Fits Hose with Inner Diameter of: Min (in)= 1, Max (in)=3, Min (mm)= 26, Max (mm)= 76.