Well, as long as you have somebody else to blame, but most people would know if you can't thread several turns with your fingers then you must assume the bolt size is wrong or the thread pitch is incorrect. Sorry, I'm not going to condem the alleged hardware guy.
I think all you can do now is drill out and tap for the next size bigger bolt. But please don't blame me if that doesn't work out.
Last edited by stratowart; 11-24-2011 at 11:18 AM.