Ten (10) #10-24 x 1/2" Socket Head Cap Screws. These take a hex / allen key to drive and are made from alloy steel with Thermal Black Oxide coating.

Diameter : #10 (or 3/16")
Thread Pitch : 24 TPI - UNC / Coarse Thread
Length : 1/2"
Type : Socket Head Cap Screw (SHCS)
Matching Nut & Washers : #10-24 - Available here
System of Measurement : Standard (Inch / U.S.)
Material : Black Alloy Steel - Class 12.9. Equivalent
Specifications : ASTM A574