The 1-3/8" x 1-3/8" Stainless Steel (303) One-Piece Clamp Rigid Shaft Coupling with Keyway - Low Profile is a precision-engineered coupling designed to connect aligned shafts and make them function as a single unit with zero backlash. Its one-piece clamp design provides high clamping power, easy adjustment, and a non-marring grip, while the standard keyway adds greater torque capacity and fixed shaft phasing for accurate shaft synchronization. Made from 303 stainless steel, it offers excellent corrosion resistance, strength, and durability for demanding environments. The Low Profile design features a clamp screw that protrudes beyond the outside diameter (OD), providing a compact shaft connection solution. With a straight-through bore, it is ideal for automation systems, motion control equipment, machinery assemblies, and industrial applications requiring precise alignment and dependable power transmission. This product is offered in High Strength and Low Profile styles and available in steel, stainless steel, and aluminum.