T head bolts with shoulder

This screw features a hexalobuar head with self tapping thread for thermoplastics

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.

a.) These type of screws are distinguished by the direction in which they tighten and loosen. Their main difference is their direction of rotation.

b.) Right-hand thread screw - Standard screws, tightened when turned clockwise and loosen when turned counterclockwise, used in most applications.

c.) Left-hand thread screw - Non-standard screws, tighten counterclockwise, primarily used in power or safety-related situations.

This is a specialized fastener designed for specific applications where the screw needs to be tightened to a specific torque. 

Hexalobular socket (6 lobe) / metric thread for both ends

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.