特殊 Rivet

a) DIN 966 係指十字孔半沉頭螺絲標準, 一般常見孔型為十字孔 (Phillips) 和米字孔 (Pozi), 這些設計便於使用相容的螺絲起子進行安裝和拆卸，可輕鬆安裝和拆卸。

b) 此螺絲頭型為半沉頭，但具有圓頂或微凸起頂部, 又稱半圓頭, 提供半齊平和裝飾性外觀。

吊環螺絲

a) A self-tapping screw for thermoplastics is a specialized fastener designed to create its own threads as it is driven into plastic materials.

b) These screws have wider, sharp, and deep threads, which allow them to cut into the softer thermoplastic material efficiently, creating a secure, long-lasting hold.

Indented hex washer head with collar

a) 與 DIN 912 不同的是，DIN 7984 螺絲具有薄型頭部且同樣採用六角孔做驅動 (內六角薄頭螺絲), 公制螺紋, 其牙外徑尺寸可從 M3 到 M24

b) DIN 7984 螺絲具有較薄的頭部，因其設計使它們與材料表面齊平。然而，這種設計可能無法提供與 DIN 912 螺絲較厚頭部相同的扭矩傳遞能力，後者由於其較厚的圓柱形頭部形狀而設計用於處理更高的扭矩。 

a) The screw head features a hexalobular socket, often referred to by the generic name “6 lobe”

b) The flat underside of the pan head distributes clamping force over a larger area compared to countersunk or round head screws.

c) Although there may be minor differences in dimensional tolerances or thread requirements, both DIN 7985 (German standard) and ISO 14583 (international standard) specify pan head screws.