Camcar - Button Socket Cap Screw: 3/8-16 x 1, Alloy Steel, Black Oxide Coated - 67122606 - MSC Industrial Supply
OEM M2 M3 M4 M5 M6 M7 M8 M10 ISO 7380 Hexagonal Hex Socket Button Head Cap Screw - China Hex Socket Button Head Screw, Socket Button Head | Made-in-China.com