#56 Worm Drive #300 Series Stainless Steel Hose Clamp
#56 Stainless Steel Hose Clamps 56 = 3.06" to 4.00" in diameter. - Minimum quantity package is 10 pieces. Discounts for large quantity orders. Standard Series: Band Width = 0.50 in.. Worm = 0.312 in. / Band and Housing Material = 300 series stainless steel Maximum Torque = 50 in.-lbs.
The Band and Screw Mechanism is #300 Marine Grade Stainless Steel. Most Clamps offered in the hardware stores have stainless bands but the Screw is carbon steel and will rust.