Special big collar hinge pin with internal threads

a) External hexalobular socket (6 lobe) / metric thread / self tapping thread for thermoplastics.

b) A double-end stud with collar is a type of fastener that features threaded ends on both sides and a non-threaded central collar or flange. Thread types of both sides can be customized according to customer's request, differen surface treatment is available upon request. 

This screw features a hexalobular socket head, big shoulder, and PRECOTE on metric threads

This screw features a rectangular head with a cup-shaped top.

a) A step shoulder pin has a shoulder, or stepped section, where the diameter changes. This creates a larger diameter at one end of the pin, forming a "step." Unlike threaded pins, these pins do not have threads along their length. They are smooth and cylindrical.

b) Step shoulder pins are used in applications where precise alignment, and secure positioning are required.

Hexalobular socket with big shoulder

T-foot mounts are commonly used in solar panel installations primarily on pitched or sloped roofs. It is designed to be used with wood screws and can be quickly installed.