(25 Pieces) 5/16-18x3-1/2" Alloy Flat Head Socket Cap Bolts Screws UNC Coarse Partial Threads Black Oxide

Material:Alloy Steel Grade Rating:Alloy Steel Thread Size:5/16"-18 Exterior Finish:Black Oxide Head Style:Flat SocketYou may also like 220PCS Large Flange Aluminum Blind Rivets，Black Rivets Pop Rivets Assortment Kit, 7 Sizes Aluminum Rivets (1/8" 5/32"3/16") Assorted Blind Rivets with Case.