I just picked up 10 or so cases of these from a company who subcontracts to make parts for GM and Chrysler. These were shipped to them in error and I was fortunate enough to obtain them. The are 6MM X M-1metric thread. I restore cars that used SAE! Lol! Anyway, if you are a light manufacturer or body shop, here's a deal on a box of 2,000. These are made in the good old USA and not chinese junk! a bargain at 5 cents each when you buy the case. I also picked up thousands of bulkhead grommets, Delco wiring clips, and other assorted item I will be selling at swap meets but will also sell in bulk if I have what you need. Call for appt to pick up one to 10 cases of these. Thanx, Les