I'm looking for an M3.5-0.6 allen screw at least 30mm long, 35mm probably preferred. Home Depot definitely doesn't have that size, Fastenal only has one listed on its site but the one time I tried buying something there they told me it was for commercial purchases only (and it's the wrong head, which isn't a big deal). If it helps it's a replacement screw for a pic rail adaptor for a scope, but I can't find any Bushnell replacement parts.