Made of 17-4PH stainless steel, the H, W, and MC Series couplings offer high strength, excellent fatigue resistance, and high torsional stiffness with reportedly twice the torque capacity of 303 stainless steel or 7075-T6 aluminum. H and W Series are general-purpose, heavy-duty couplings; higher- capacity MC Series has two sets of flexures for increased parallel offset. Shaft sizes from 1.5 to 44.45 mm are accommodated. Helical Products Co., Santa Maria, CA
