Thin head square neck screw

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.

a) Unlike DIN 912, DIN 7984 screws features a low-profile head and a hexagonal socket drive (Socket thin head cap screws) with metric thread ranging from size M3 to M24

b) DIN 7984 screws have a thinner head because they are designed to be countersunk, allowing them to sit flush with the material surface. However, this design may not provide the same torque transfer capacity as the thicker head of DIN 912 screws, which are designed to handle higher torque due to their thicker cylindrical head shape.

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.

Extremely low head

Flat head weld stud with metric thread