My solution has been to use small plywood "washers" and T-nuts. The plywood washers are to spread out the load, same as a fender washer, and to give the t-nut something to bite into besides the cabin top. I confess that I've only used this on wooden boats, but it works. Who wants to scrape their skull on a protruding nut, anyhow? 1"x1"x 1/4" makes a nice washer. I use a cheapo Black & Decker belt sander to clean them up. It has an attachment that allows it to be clamped to a workbench upside down for such things. Cheers Steve Tyree In a message dated 2/24/2006 2:53:22 PM Central Standard Time, tsmith@nextit.com writes: Don't know any other word for what I'm looking for. All us us have nuts/bolts protruding inside our boats. Has anyone ever heard of a soft cap (rubber, vinyl, etc) to fit various sized nuts/bolts? Gotta be out there somewhere. I've thought of the dab of silicon, but I don't like that alternative. I'm looking for a specific product. I've searched the internet without success so far... t /)) Tom Smith & Jane VanWinkle M17/496 & M17/064 ~ Accept Yourself - Respect Others Live Simply - Relax Daily ~