seems after acquiring a hull bracket it disappears once i use it, it doesn't come up on my cargo at all, and its the 3rd time this has happened, anyone else experiencing this?

They are an item that install into ship systems but doesnt take space like xcharge cells .

Pay attention to your hull bar the next time you get a durtanium bracket. You should notice it will increase by 10 points.

11 or 12 even if you have the kalvinium hulls (1 or 2)

always rollover the item in your cargo 1st...it explains what it does in the form of a Dan tool tip