Nut, 7/16in x 20tpi ea

Nut, 7/16in x 20TPI x 0.4in High, zinc plated.  Norton LRH steering head pinch bolt nuts, full size
Original part number:
B2/643; 13459 - steering head pinch bolt nut [Norton] for stud B2/642
same thread used on
9165 - valve rocker securing nut [Norton 1932-1938?]
11664 - rear brake arm torque nut
E3238; A3/103 - crankcase and rear engine plate bolt nut