Home » headsets » Threaded Headsets » f974ew THREADED HEADSETS F-974EW| F-974EAW | F-974EHW EC29/25.4-24tpi | EC29/27 Steel Ball Retainers Top Nut: 22.2 Cup O.D.: 30 | 32.5 | 34 Crown Cone: 27 Height: 34.4 Technical Diagram