These are stainless steel precision Torx screws. They are very hard to find. This model is a shallow socket head. It is unique in that it requires less socket depth to flush to the surface. These are commonly used in knife and gun making applications.
Specifications:
Thread Length = .490-.500
Head Diameter = .141
Torx Size Required= T-8
302HQ Stainless DFARS Compliant
Made in the USA
(1) Package = (25) Screws