Flat head plum blossom with column

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

The flat-head plum blossom with column refers to a type of screw or bolt head that features a plum blossom (hexalobular) drive design with a central column. This design is commonly used in tamper-resistant fasteners, requiring a specialized driver bit for installation and removal.

主要功能：

1. Flat Head – The top surface is flat, allowing it to sit flush with or below the material surface when installed.

2. Plum Blossom (Hexalobular) Drive – A star-shaped recess with six rounded lobes, providing better torque transmission and reduced cam-out compared to standard Phillips or slotted drives.

3. Central Column (Pin) – A small protrusion in the middle of the drive recess, acting as a security feature to prevent tampering with standard bits. Only a compatible pin-in-hex or security Torx bit can engage with it.

4. Tamper-Resistant – The central column makes it difficult to remove with ordinary tools, enhancing security in public or high-risk installations.

常見應用：

• Electronics (e.g., gaming consoles, hard drives)

• Automotive components

• Public fixtures (e.g., restroom hardware, street furniture)

• Aerospace and machinery requiring secure fastening

• Flat head plum blossom with column

Standards & Sizes:

• Often follows Torx TR (Tamper-Resistant) standards (e.g., Torx TR8, TR10, etc.).

• Available in various screw sizes (diameter and length) depending on application needs.

This design balances security, torque efficiency, and a low-profile finish, making it ideal for applications where both tamper resistance and a smooth surface are required.