hexagon castle nut 六角冠状螺母 ; 六角槽顶螺母
hexagon thin castle nut 六角冠状薄螺母
hezagon castle nut 开槽六角螺母
light castle nut 轻型堡形螺帽
fulcrum pin castle nut 支销槽顶螺母
castellated nut castle nut 槽形螺母
heagon low castle nut 六角蝶形螺母
castle circular nut 六角圆顶螺母 ; 六角圆螺母
castle e nut 城堡螺母 ; 开花螺母
N a hexagonal nut with six slots in the head, two of which take a locking pin to hold it firmly in position 槽顶螺母
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