Pan head pozi hi low thread screws

a) DIN 912 (ISO 4762) refers to a standard for metric socket head cap screws, also known as cup head screws. These fasteners feature a cylindrical head with a hexagonal recess (socket) in the center, allowing them to be tightened or loosened using a hex key or Allen wrench. These screws are commonly used in various applications where a high tensile strength is required.

b) A socket head cap screw with a knurled head is a modified version of the standard DIN 912 screw, featuring a textured knurled surface around the head. This design provides additional grip for manual handling or adjustment, making it ideal for certain applications.

a) A self-tapping screw for thermoplastics is a specialized fastener designed to create its own threads as it is driven into plastic materials.

b) These screws have wider, sharp, and deep threads, which allow them to cut into the softer thermoplastic material efficiently, creating a secure, long-lasting hold.

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.

Flat head weld stud with metric thread

Square neck under head

a) DIN 7500 specifies self-tapping screws for metal, also known as thread-forming screws. These screws are designed to form or cut threads in a pre-drilled hole in metal materials, without requiring a pre-cut thread.

b) The screw shank has a three-lobe shape instead of a round cross-section, which reduces friction during installation, and facilitates smooth material displacement and efficient thread formation.

c) The long dog point (the extended, unthreaded tip of the screw) acts as a pilot, helping to align the screw with the pre-drilled hole during installation, and faciliates smooth installation.

d) A standard trilobe thread forming screw without dog point is avaialble upon request.