50PCS 12.9 Hexagon Socket Head Set Screw/Base Meter/Machine Meter Wire/Headless Screw M5x3/4/5/6/8/10/12/16/20/25/30 - (Size: M5/ 12mm) SCRW-119900 - - Amazon.com
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Amazon.com: Socket Flat Countersunk Head Cap Screw, 5/16-18 x 1", Alloy Steel, Black Oxide, Hex Socket (Quantity: 100) Coarse Thread, 5/16 inch Hexagonal Allen Bolt, Length: 1 inch, Full Thread : Industrial & Scientific
PB Swiss PB-214 H-12 Long Chrome Hex/Allen Key Set - - Amazon.com