1/4-20 x 1-1/2" Flat Head Socket Cap Screws Countersunk Bolts, 304 Stainless Steel 18-8, Bright Finish, 25 PCS: Amazon.com: Industrial & Scientific
KINJOEK 100 Packs 1/4-20 x 3/4 Inch Flat Head Socket Cap Screws, Allen Socket Drive, 304 Stainless Steel 18-8, Full Thread, Bright Finish, Heavy Duty Hexagon Countersunk Machine Screw Drive: Amazon.com: Industrial & Scientific
Amazon.com: Bolt Base 10mm A2 Stainless Steel Countersunk Csk Hex Head Socket Screw Allen Bolts M10 X 40 - 50 : Industrial & Scientific
Titen HD Countersunk Head Style Heavy-Duty Screw Anchor - Tropical Construction Supply