Likewise, you can use a 12-point socket on a hex-head bolt or nut, but you cannot use a 6-point socket on a double-hex, or 12-point, fastener. For reference, 6-point hex nuts are shown above on the ...

For reference, 6-point hex nuts are shown above on the left, while blue-anodized 12-point double-hex nuts are on the right. Advertisement That scenario might lead you to think that 12-point ...