Eye-bolts do pose some threat to tree safety but far less than “choking” it with straps does. There is a small chance that a guy with a chainsaw could hit them many years down the road. x 8 in. For instance, for a 50-inch swing, space the hangers 52 to 54 inches apart. 1" diameter by 12" long Eyebolt. Eye bolts have a shank for anchoring to structures or equipment and a ring for attaching rope, hooks, or other hardware. Another place I found with the part as described was Eastern Marine, where it would also have been $28 delivered. I finally got around to trying a hammock. This will aid uniform weight distribution and also prevent the chains from rubbing against the swing when in motion. As an arborist we do this all the time to strengthen the tree with bad form. They're used as anchor eye bolts for routing or tying down wire and cable. ie Bacteria from the bolts. I wanted the removable eye bolts, so, went searching. ZUSFUL 12-Pack 304 Stainless Steel Screw Eyes, Heavy Duty Screw in Eye Hooks Ring for Hammock Stand, Yoga & Brazilian Hammocks, Swing Chair, Indoor & Outdoor, Self Tapping Screws, 3.2 Inches Eye Bolt 4.7 out of 5 stars 109 Permanent Eye Bolts for Hammocks? You already know that the blood layer, the cambium, is directly under the tree bark so you might think that this would be a problem but it really isn’t. Great for light-duty applications, it is made with steel for strength and is … the upshot is- the less slack in your hammock, the more horizontal force you are putting on each eye bolt- at a 30 degree angle from the horizontal, you're actually putting about 165 lbs of force on each eyebolt. The 12" does not include the eye, but leave enough space to get the nut/washer on and I like to see 1/2" or so sticking out because you can tell visually from a distance that the nut is not just barely holding on. According to the hammock calculator I need to install eye bolts 11.3 feet high. Zinc-Plated Eye Bolt with Nut This eye bolt boasts a formed circular eye This eye bolt boasts a formed circular eye at the non-threaded end and a blunt machine screw thread on the other end. Muzata 316 Stainless Steel Eye Shape Screws, Heavy Duty Screw Eyes for Metal Hook, Wood Terminal Ring Eyelet Hooks, Hammock Stand, Self Tapping Screws, 3.5 Inches M6 Eye Bolt … Eye bolts cause minimal short term damage and the tree will continue to grow unaffected. If this is your first visit, be sure to check out the FAQ by clicking the link above. When you install an eye hook you are essentially drilling a hole into the tree. The trees will be able to recover from the bolts installation. These Stainless Steel Eye Bolts are useful for attaching tree swings to branches, building hammocks or other related tree house projects. To start viewing messages, select the forum that you … 1/2 in. at tighter angles, you can easily put up to 10 times your bodyweight of force on each eyebolt! 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