Flat head weld stud

Steel weld stud fully threaded

a) DIN 966 refers to a standard for countersunk raised head screws with a cross recess drive (commonly Phillips or Pozi)

b) The screw head is partially countersunk but has a domed or raised top, providing a semi-flush and decorative appearance.

Similar to (DIN 6922), these bolts also have a flange (a disc-shaped extension) beneath the head, which acts as an integrated washer. The flange provides a larger bearing surface and aids in distributing the load, making these bolts suitable for various applications. It's worth noting that it is common for these parts to feature serrations under the head, further enhancing their functionality.

Serretions under head / Extremely short length

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.