Profile: Sigma Stamping, Inc. is a producer of precision metal stampings, spline-formed parts and assemblies. We fabricate a wide variety of clutch housings & sub-assemblies for the automotive and heavy equipment industries. Our processes capabilities include machining, MIG welding, laser welding, helium mass spectrograph leak detection, riveting, balancing, slotting, specialty deburring, spline forming, restriking, trimming, piercing, outsourced brazing and nitriding. We also provide chassis, suspension, powertrain and seat hardware stampings.