Amazon.com: 4PC Titanium Flange Bolt M6 X 15mm X 1.0mm Allen Hex Cap Head Screw - Hex 8mm : Industrial & Scientific
Pack of 10 raised head screws with flange M6 x 20 mm - ISO 7380/2 - A2 stainless steel - hexagon socket - V2A - lens flange head screws (10, M6 x 20 mm) : Amazon.de: DIY & Tools
Amazon.com: 1/4-20 x 1-1/4" Button Head Socket Cap Screws, Allen Socket Drive, Black Oxide, Grade 10.9 Alloy Steel, Fully Threaded, 50 PCS : Industrial & Scientific