| 摘要 |
PROBLEM TO BE SOLVED: To provide a wheel nut seat structure facilitating coating by increasing an angle of an angular portion of a nut seat inlet, and improving coating performance. SOLUTION: (1) This wheel nut seat structure comprises a two-stepped seat 20, an inner side seat 21 made from a taper seat having an opening angle of 60 deg., and an inlet side seat 22 made from a taper seat having an opening angle of 80 to 95 deg.. (2) The wheel nut seat structure comprises the two-stepped seat 20, an inner side seat 23 made from a spherical seat, and the inlet side seat 22 made from the taper seat having the opening angle of 80 to 95 deg..
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