Double end stud with nibs on flange

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. 

Special design for an internal thread tube, mushroom head, partially knurled body

a.) A double-ended threaded rod is a type of fastener that features threading on both ends of the rod, with a section in the middle that may or may not be threaded.

b.) This design allows the rod to be used in applications where two components need to be joined, often with nuts or other fasteners securing the ends.

a.) These screws combine the attributes of a flange-headed bolt with a triangular head. This unique design requires a matching triangular driver for installation or removal.

b.) These bolts are excellent at providing minimal tamper resistance and security. While these bolts provide some level of security, they are not as secure as other security screws. Therefore, caution should be exercised when using them in applications where security is paramount.

These bolts are commonly used in applications where precise alignment and smooth operation are required, such as in machinery, and automotive assembly. The shoulder is used to support and position components, providing a precise pivot point or bearing surface.