Norton E3220 nut and washer, 7/16in x 20TPI correct dimensions, domed, ZP, Footrest pedal rod/ bolt nut, domed. Fits 5/16 W; 3/8 BSF spanner, BSCY / CEI Original part number: 9561; A2/511; E3220 - footrest rod nut (domed) E5377; D12/977 - washer