Gearbox outer cover fixing screws for upright Norton gearbox (set of 4) stainless steel. Suits upright gearbox 1935 to 1948 and laydown gearbox 1948 to 1956, 1/4 BSC Original part numbers: 3622; N8117; A2/309; A11M/822 - Gearbox outer cover fixing screws x 4