These hooks are BEST when they work, but the screws die on me Recent DuraHook purchases didn't work with my galvanized metal 1/4" hole board (trade name AlligatorBoard). When I bought some of these hooks a few years ago, they came with working screws. The screws I received recently are slightly too small to fit in the perforated metal plate, about 1/32". Here are the types of screws I'm aware of: 1. 1/4" screws that came with hooks, which I recently had 2. 1/8" screws that also came with hooks (never used, this is for small perforated panels) 3. 1/4" screws that I've received in the past (about 1/32" larger than new, work well with perforated metal plates). Depending on the type of perforated sheet, you may see conflicting reviews on this site. from different manufacturers and what kind of screws they got. I don't know if the manufacturer (Triton Products) changed the screws used at some point, or maybe there's another reason I got different screws at different times. Anyway I contacted the manufacturer and they were able to send me some slightly larger screws that will work with the metal plate. They work great so you'll probably want that as Plan AI couldn't find the right type of screws anywhere else other than Triton products; This is an unusual screw made for thin onlay, with very coarse threads and only 1/2 inch long. If you can't find good screws, I've looked into a few other options. If you can access the back of the fairing, it's easy. Use bolts with nuts. If you can't do this and need a "pocket hole" solution, I found an option called "Bore Nuts", aka "Rubber Insulated Rivets", are nuts; these are small rubber plugs with a Brass threaded insert. When you pull a screw in, they contract and expand. It's not elegant, but it works. You need thread size 6-32, bore size 1/4", overall length .981" with a 1 "6-32 machine screw and possibly a large #6 washer. The caveat with the nuts is that they are nearly 1" long, so you'll need some clearance behind the perforated plate. The shorter well nuts I could find were too large in diameter to fit the holes in the plate. Nuts, as well as various fixed rivets (I have not tried them). The DuraHook definitely won't work unless you can insert a strong screw or bolt into the perforated plate to secure it. If you have a galvanized perforated metal panel, don't plan on using the screws that come with these hooks. (Although they may work with some brands of metal plates, I don't know.)
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