Originally Posted by Alex W
I'd also watch the load rating on those cam cleats, a standard Harken 150 is only rated to 300lbs. The one in that photo looks like it might be a Ronstan, I can't tell if it is the medium size (275lb rating) or large (510lb).
Since you are so concerned..
I checked today, the cleat I used is a Ronstan MF5410 with MWL 250kg (275lb) BL 500kg (551 lb)
A safety factor of 5 for a non critical application.