六角薄頭螺絲 圓柱末端

DIN 6922 概述了具有細桿徑的六角法蘭螺栓的尺寸和技術規格. 此螺栓另一特點是有一個法蘭圈, 頭部下方有一個圓盤形延伸部分, 用作整合墊圈. 法蘭圈的加入增強了軸承表面並有利於負載分佈. 狗尾端帶錐形截面尾

吊環螺絲

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。 

Screw refer to ISO 14581

Square neck under head

a) DIN 7500 specifies self-tapping screws for metal, also known as thread-forming screws. These screws are designed to form or cut threads in a pre-drilled hole in metal materials, without requiring a pre-cut thread.

b) The screw shank has a three-lobe shape instead of a round cross-section, which reduces friction during installation, and facilitates smooth material displacement and efficient thread formation.

c) The long dog point (the extended, unthreaded tip of the screw) acts as a pilot, helping to align the screw with the pre-drilled hole during installation, and faciliates smooth installation.

d) A standard trilobe thread forming screw without dog point is avaialble upon request.