Nearly all industrial driveshafts are connected to machinery via a companion flange. AISCO Industrial Couplings, LLC. can supply standard and special companion flanges for our complete line of universal joints plus those manufactured by others. In addition to the typical bore and keyed designs companion flanges can be supplied with spline bores, flatted bores, polygon bores etc. For high capacity or high wear applications AISCO Industrial Couplings, LLC. companion flanges can be supplied with heat-treated alloys and carburized or nitrided bores.