M8-1.25 x 20mm Flat Head Socket Cap Screws, 10.9 Grade Alloy Steel, Allen Socket Drive, Black Oxide Finish, Full Thread, Quantity 20: Amazon.com: Industrial & Scientific
50 Pcs M5-0.8 x 8mm Button Head Socket Cap Screws, 10.9 Grade Alloy Steel, Allen Socket Drive, Black Oxide Finish, Full Thread (10.9 Grade,M5-0.8 x 8mm,50 Pcs): Amazon.com: Industrial & Scientific
Amazon.com: uxcell M8 x 25mm Full Thread Nylon Metric Hex Head Cap Screw Bolt 20 Pcs : Industrial & Scientific
Amazon.com: BUSY-CORNER 80 Pieces Vacuum Cap Assortment Kit, 8 Sizes, Dropper Caps ID 1/8'' 5/32'' 3/16'' 7/32'' 1/4'' 5/16'' 3/8'', Hose Caps Kit for Car Carburetor Manifold : Automotive