This is the mounting system that we use with our Tek-Lok and other sheath/holster belt loops and fasteners.

The mounting assembly comes with:
    
    (1) Threaded Aluminum Stud - Black Coated
    (1) Phillips Head Screw - Black Coated

Cylinder diameter 5,2mm
Cylinder length 3,4mm
Head diameter 10,5mm
Total length min 7,5mm