DIN 7504K Hex washer head self drilling screw
a) 鑽尾螺絲是一種設計用於在旋入過程中自動鑽孔並切割螺紋的螺絲，無需預先鑽孔。它具有類似鑽頭的尖端，能夠輕鬆穿透工件。這種設計有助於加快安裝過程並提高效率。鑽尾的形狀和材質會影響螺絲的鑽孔能力，從而決定在不同材料中的表現。
b) 頭部下方的鋸齒狀設計會在螺絲頭部與材質之間產生額外的摩擦，幫助防止螺絲鬆動。鋸齒狀表面為螺絲起子等工具提供更好的抓握力，使得在安裝過程中可以施加更大的扭矩，從而提高螺絲的固定效果。
| Description | |
|---|---|
| Material | Steel hardened 240 - 425 HV 0.3 core hardness |
| Type | Self drilling screw DIN 7504 K |
| Driving recess type | Indention |
| Head Type | Hexagon washer head |
| Thread Type | Self tapping thread |
| Surface color | Zinc plated bluish |
| Thread size / diameter | ∅ 2.9 - 6.3 |
| Length | 3/4 |
| Type of end | #1 drill point |
| Field of application | Aluminium windows / doors, metal roofing, metal sheet |
相關產品
頭部錐形焊點
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)
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。
與 (DIN 6922) 類似, 這些螺栓在頭部下方也有一個法蘭圈（盤形延伸部分), 可作為整合墊圈之用. 法蘭圈提供了更大的承載表面並有助於分佈負載, 使這些螺栓適合各種應用. 某些六角法蘭螺栓會在頭部下方帶鋸齒, 這進一步強化了它們在不同應用場合上的功能。
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.
a) A ribbed neck screw is a type of fastener designed with a special feature on its shank or neck. Instead of a smooth or threaded surface, the neck of the screw has ribbed, serrated, or knurled features. These ribs or serrations provide additional grip and resistance when the screw is driven into a material, preventing it from rotating or loosening.