Hexagonsocket head cap screws with countersunk head screws like.
角紧顶螺钉固定在底座上。
2
Hexagon wrench size is sometimes referred to "M" followed by the size of the tool or socket, that is, "M6", although this may be confused with the precise criteria for use;
内六角扳手大小有时提到'M'跟随由大小在工具或插口，即'M6'，虽然这也许与准确的标准用途混淆；
3
Hexagon wrench size is sometimes referred to "M" followed by the size of the tool or socket that is "M6" even though this may be mistaken with the precise criteria for use;