M4-0.7 x 8mm Flanged Button Head Socket Cap Screws, Stainless Steel 18-8 (304), Full Thread, Allen Socket Drive, 50 PCS: Amazon.com: Industrial & Scientific
Steel, Grade 8, Hex Head Cap Screw - 21C423|U04110.075.0400 - Grainger
Flanged Socket Head Cap Screws - BN 1392 & 3873 - ITA Fasteners