1/2-13 x 6 Inch Coarse Black Oxide Heat Treated Alloy Steel Socket Cap Screw Best Seller The universal 18mm size is

The universal 18mm size is compatible with most 18mm handles

4301446 and 9711304

GM General Motors - 10283414

5/32 Inch Door & Exterior Trim Specialty Rivet Cadillac

1/2-13 x 6 Inch Coarse Black Oxide Heat Treated Alloy Steel Socket Cap Screw Best Seller The universal 18mm size isSocket head cap screws are commonly used in machine assembly for removable panels and parts. They have a round cap with a hex head and are tightened with a socket wrench drive. Longer caps are easier to see when fastened while button and flat head caps are less likely to snag clothing or linkages. Cap screws with a black oxide or armor coat finish resist corrosion.