Stainless steel torx bolts (or star bolts) can be divided into two parts: the bolt body and the bolt head.
The body of a stainless steel torx bolt, like other bolts, is round with threads, which can be metric, inch, partial, or full threads.
The head of a stainless steel torx bolt is spherical, similar to the DIN 7380 standard bolt. However, instead of a recessed hexagon like the DIN 7380 countersunk bolt, the stainless steel torx bolt is stamped in a star shape. This is why this type of bolt is called a stainless steel torx bolt or star bolt