Knurled nut used with Stewart Warner speedometer and tachometer drive cables. This nut fits the instrument end of the cable. Used on Duesenberg, Cadillac and others. Small (STW-0013) and large (STW-0014) size available. Material: Brass Finish: Cadmium Thread: 3/4-20 Thread length: .390 OD: .881 Small, .996 Large ID at top: .612 Small, .697 Large