There has been several readers expressing concern about the bolts and suggesting that bolts would be the weakest link.
The bolts are oversized with such margin that discussions regarding bolt strength are not really relevant. A single bolt is more than sufficient to deal with expected loads, even in a hurricane situation. Just think cleats on boats are bolted in, wheels on the car are bolted on. A grade 2 bolt has min yield stress 33000 psi, 1/2 inch bolt is good for approx 25000 pounds and we have 4 of them on our 35 and 45 pound models. These models are sized boats that weigh 15-20,000 pounds so you could literally suspend the boat of that bolt. For example expected loads on a 45 lbs anchor if properly sized for a boat are less than 10,000 even in the worst imaginable conditions. The chain, the cleat, or the shank hole will brake long before the bolts on the anchor will, not to mention the shank will bend. Now the reason we did not have the shank plate take the load is bc we found that a smooth bottom on the fluke is very important for penetration. Prototypes with shank slotted through the fluke did not do well in hard bottoms bc of added volume to drive through undisturbed hard clay for example. This is why Spade Anchor has difficulty in really dense soils, the nose has too much volume.
The nuts on our anchors are to be used with compression washers and grease and if you don't feel like ever taking the anchor apart until the time comes to re-galvanize it, than you can forget about the bolts after initial assembly.
We do offer a lifetime warranty on the anchor and all its parts.
I hope this alleviates some of the concerns raised about using bolts. Again remember bolts are on wheels of your car, attach rotors of the helicopter blades, there is a whole world bolted out there..... of-course size matters!
I hope this conversation alleviates some concern about the use of bolts in the expected load path on our anchor.
However, the discussion on bolts and anchors ability to break down for storage is a tangent. The main point I want to communicate and hopefully convince some of you
Is that Mantus Anchor's ability to DIG IN is unparalleled. This was the whole point of the design after all, otherwise there is no room for just another anchor.
Ok my rent is over.... Happy 4th everyone