特殊 Rivet

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。

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。

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

Cross recee type H (phillips) is available upon request

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.

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.