The advantage of the Makefast design for U bolts is that they are adjustable from above the deck where there is easy accessibility.
The nuts can be run up by hand on the underside of the deck, where confined space makes it difficult to use a spanner, and then can be tightened from above deck.
If necessary the nuts can be adjusted by up to 3 mm. (0.12"), to compensate for any unevenness in the deck.
After they are tightened the nylon collars snap over them.
* In Type 316 stainless steel with A4 stainless steel nuts and washers.
* M6-M12 U Bolts are supplied with 1 plate and have black nylon 6 collars over stainless steel nuts.
* M16 U Bolt is supplied with 2 plates and has stainless steel collars and nuts combined.