I found another thread on this but no real solution. I want to put grease nipples on all of my bearing blocks. I looked up the specs and found that the blocks take m6x0.75mm zerk type fittings. Pulling the plugs out I see the threads appear straight. Has anyone put grease fittings on these things? Where do you get them? I need like 10 of them. Seems silly to post this but I have searched and searched with no luck. I found a couple tapered m6x0.75 fittings but nothing with straight thread. Are people using the tapered thread? Thanks!