Stafford Mounting Shaft Collars include Flange Mounts with six mounting holes and a keyway plus the Accu-Clamp non-marring and perfectly square clamping feature for mounting a shaft, tube, or pipe to a flat surface or for attaching components to them. Additional solutions include Accu-Mount collars with precision locating hubs and predrilled and tapped holes, and conventional Face Mount Clamp collars with predrilled and tapped holes.