Nut, 5/16in x 26TPI, extra height (9/32 inch), smaller OD /AF approx 7/16 AF (11mm) zinc plated. BSCY / CEI (cycle thread), chamfered one side only. Norton Dominator crankcase stud nutNorton part numberE3231 - dry sump gear pump crankcase stud nut; silencer clip bolt nut067592; 06-7592 - Norton Dominator crankcase stud nutSupercedes A11/43 - pressure release adjusting screw locknut ( International and Manx);A2/412F&R - stop stud nut for pawl carrier ( gearbox footchange)A2/411A - gear box control rod nutB2/640 - steering damper adjuster rod spring locknutD12/970 - stud nut securing chain tensioner to crancaseD12/981 - stud nut for carburettor fixingGT177