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Ten (10) #6 - 32 x 3/8" Socket Head Cap Screws . These take a hex / allen key to drive and are made from alloy steel with Thermal Black Oxide coating.

Diameter : #6
Thread Pitch : 32 TPI - UNC / Coarse Thread
Length : 3/8"
Type : Socket Head Cap Screw (SHCS)
Matching Nut & Washers : #6-32 - Available here
System of Measurement : Standard (Inch / U.S.)
Material : Alloy Steel with Thermal Black Oxide - Class 12.9. Equivalent
Specifications : ASTM A574