Exhaust nut / rose, fits Norton OHV and OHC singles, dull-plated brass like the originals, beautifully made in UK, RGM style. Cylinder head exhaust port to exhaust pipe threaded nut, short thread, approx 5/8 in long. Suits years 1938+ Use Special spanner R-050654 with 3 points of contact to avoid bent fins.Original Part Number:3519; A3/167, 18197 - Exhaust pipe flange locking nut (cylinder head) [A3/168 is the pipe clip]
