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Chainplate Eyebolt Kit C-22

Chainplate Eyebolt Kit C-22

Part #: D101

Price: $178.91

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Three problems are addressed by this retrofit:

New 1/2" eyebolts are much stronger than the original 3/8" version.

The original eyebolts will twist in the deck. This causes the seal between the eyebolt and the deck to fail. Since the deck has a marine plywood core, water entering at the eyebolt can cause dry rot and compromise the strength of the deck at the worst possible spot. The disk welded to the base of the eyebolt allows the chainplate to be screwed to the deck, preventing rotation and providing a wider and more stable seal.

The original installation used flat washers only under the deck, inside the boat. The small surface area of the washers create point loading that can lead to deck failure. The kit includes stainless steel backing plates for the lower shrouds to spread the load over a larger are to prevent the eyebolts from pulling through or compressing the deck structure.

Six eyebolts, four backing plates, nuts, washers, and sealant are in the kit. A 1/2" cobalt drill bit for drilling the chainplate strap on the main bulkhead is also included. We now also include turnbuckle lubricant. It is essential that the eyebolts be lubricated before installation to prevent galling which can cause the stainless steel parts to seize together.

Bolt diameter: 1/2"
Bolt length (below top deck surface): 1-1/2"
Top plate diameter: 1-7/8"
Maximum clevis pin diameter: 5/16"

Note: Some owners of very early boats (~ 1971) report that their eyebolts for the forward lowers are mounted so close to the cabin that they had to grind a flat on one side of the new top plate to avoid the side of the cabin

More Images: (click to enlarge)

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