I attach two photographs of a Force stainless steel anchor
swivel that I purchased from a reputable chain and handling company in Hobart, Tasmania last year. I needed a swivel at the anchor
to pass through the constrained anchor fitting at the bow. After looking at several other swivels, I determined that the branded Force swivel was the biggest and strongest that would fit the chain, the anchor and the anchor fittings on the stem.
As we approached an anchorage off Great Keppell Island on the Great barrier Reef
last month, I noticed that the swivel was separating and thread appeared between the swivel components. Closer examination revealed that the threaded swivel bolt was holding by just two threads and I was able to undo it with my fingers. A week earlier we had been anchored inside a coral
reef in 25 knot
The photographs reveal that the securing weld on the threaded S/S bold had failed due to either crevice corrosion
or an inadequate weld in the first place. The weld spots are tiny!
I subsequently found two Force swivels of the same model on a chandler's desk with the same failure - having been returned with identical failures. I have since returned the swivel and obtained a refund and advised the supplier of the fault.
The swivel has been replaced by a tested galvanised bow shackle and I will never again use stainless steel
in any anchoring gear