PEM PFAP PEM PFQT The new PEM® toolless panel fasteners, featuring PFAP™ Auto-Lock Plunger assemblies and PFQT™ Quarter-Turn Lockable Plunger Panel Fasteners, are designed for easy one-hand operation and rapid panel attachment. As equipment becomes more compact and service requirements demand greater operability in limited-access areas, the miniaturization trends of fasteners are becoming more evident. Traditional threaded fasteners often require tools and two-hand operatio