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a)此規範定義了 十字孔盤頭螺絲 (Cross recessed raised cheese head screws) 的規格. 這些螺絲具有凸起的圓柱形頭部, 一般常見孔型為 十字孔 type H (Phillips), 米字孔 Type Z (Pozi), 和 梅花孔 (Hexalobular socket / 6 lobe)
DIN 912 / ISO 4762
a) DIN 912 (ISO 4762) 是指公制內六角螺絲的特定標準, 也稱為杯頭螺絲, 具有圓柱形頭部, 中心有六角形凹槽 (Socket), 可以使用內六角扳手 (Hex Key or Allen Wrench) 將其旋緊或鬆開. 這些螺絲通常用於需要高拉伸強度的各種應用。
b)帶滾花頭的內六角螺絲是 DIN 912 的變化型,頭部周圍具有滾花紋理表面。這種設計提供了更好的抓握力,便於手動操作或調整,特別適用於需要頻繁調整的應用場合。
大扁平頭 機械牙螺絲
Extremely low head
鍍紅銅焊接螺絲
a) A weld screw is a fastener specifically designed for welding onto metal surfaces, particularly steel. It is coated with a thin layer of copper, which enhances conductivity and improves weld quality by ensuring a strong and consistent bond.