大扁平頭 機械牙螺絲

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) 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。

a) ISO 7380-2 訂定了帶有華司的內六角圓頭螺絲標準。通用內六角梅花孔（6 lobe）設計是另一種在各種應用中廣泛使用的常見替代方案。

b) 此螺絲在牙尾末端有一個延伸的圓柱形尖端( 通稱為狗尾 dog point), 其作用為可在對接的部件中做到精確地對準與定位。

十字或米字孔亦可接單生產

a) This bolt features an external hexalobular socket with a small flange, and is designed for applications requiring a high torque transfer with reduced risk of cam-out. 

b) The star-shaped head allows for great torque transfer by distributing the load more evenly across the drive, compared to traditional drive systems like Phillips, Pozi or slotted.

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.