Make sure that when you install them the hole is facing the side, not top or bottom. Also remember that you need to align the hole before you install the nut. Do not turn the bolt as there are splines on the bolt. I just lubed mine 2 days ago. This is a great upgrade!
Russ and Linda, So. California
2004 Chevy Silverado 2500 HD, D/A, SRW, SB
2005 2955RL, Pullrite Superglide 16K hitch. Bridgestone Duravis R500 tires. EZ Flex Equilizers with wet bolts.EMS HW50C