Crankshaft outer pulley bolt for early 1.6 Mk1 MX-5 & Eunos Roadster. This is for the very early 1.6 engined cars with the short nose crank 1989-1990 (distinguished by having 4 slots in the crank pulley as opposed to 8). Genuine Mazda part, 4 of these are used to hold the outer pulley on.
B631-11-405. NM00993.