Bush, timing cover, exhaust or inlet camshaft, Norton singles

Bush, timing cover,  exhaust or inlet camshaft, Norton singles 1936+ . and inlet camshaft bush pre 1948. flanged 5/8in bore; 5/8inch overall length
Original part numbers:
8840; A2/20; C2/20; 10657; 13788 -  camshaft bush (timing side) exhaust
8839; A2/19 use A2/20: C2/20 use A2/20