New factory Mazda OEM rear lower control arm nut for the outer bolt for NA and NB Mazda Miata. This is the nut that goes on the bolt that connects one rear lower control arm to the bottom of the rear spindle on one side of the car. These nuts on the 90-97 Miata have a course thread pitch and the nuts for the 99-05 Miata have a fine thread pitch but they are interchangeable as long as you use the correct matching bolt. Part numbers B037-28-091 (90-97 course thread) or B001-39-037B (99-05 fine thread). Fits 1990-1997 or 1999-2005. Sold individually as one nut. Choose year and thread style.
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