Special big collar hinge pin with internal threads

This multi-tooth bolt features a drive head with 12 contact points, enhancing torque transmission and reducing the risk of tool slippage.

雙頭牙螺栓

a) A step shoulder pin has a shoulder, or stepped section, where the diameter changes. This creates a larger diameter at one end of the pin, forming a "step." Unlike threaded pins, these pins do not have threads along their length. They are smooth and cylindrical.

b) Step shoulder pins are used in applications where precise alignment, and secure positioning are required.

These hex head screws with two sides cutting are designed to simplify installation in various materials.

This is a specialized fastener designed for applications requiring both secure fastening and specific mechanical properties.

a) 壓鑄螺釘(螺絲)，也稱為自鉚螺釘, 是用於鈑金製造和其他需要牢固, 永久緊固的應用的緊固件. 它們通常由頸部或頭底下帶有滾花或鋸齒狀的螺紋螺柱搭配平面頭型或法蘭頭型組成。

b) 安裝過程包括將壓鑄螺釘插入金屬板上已預先沖孔/鑽孔的孔中. 然後, 使用壓力機或類似工具, 將螺釘的滾花部分壓縮到周圍的金屬中, 從而形成牢固且永久的連接, 無需焊接或額外的硬體. 其優點具有高強度、抗振動和薄型安裝等。