Contact D & R Marine - drmarine.com - as they are *THE* source for O'day parts, etc. and may give you specific 'hints' of specifically how to 'easily' tighten/replace, etc.
I want to follow up on the above quote in the hope that someone can leverage my research.
I never heard back from Rudy, even after I called him about a week later to inquire if he had found a source. He had my number and remembered speaking with me, but never contacted me again. My impression is that D&R specializes in the O'days of under 25 feet overall.
I eventually stumbled on the RigRite website, as a source of chain plates and backer blocks. The O'day 34/35 uses NavTec U bolt type chainplates
. Here is a pic
These are available in 3/8" and 1/2". Here is what the RigRite website says about them;
3/8" Navtec U-Bolt Chainplate Assembly: Nav UBA-6S-2:
Navtec 3/8" U-Bolt Chainplate Assembly bolts through Deck to special Tie-rod Block which accepts SS tie-rod at a specific angle. Formed, flattened SS U-Bolt has 3/8" thread with 1 5/8" between centers, and extends 2" below deck surface. Note that some units were produced extending only 1 3/4" below deck, these are no longer stocked. Assembly includes U-Bolt with SS Top and bottom plates, lock washers and nuts. As used on a variety of boats including Bristol, Cal, C&C, Ericson, O'Day, the Hobie 33, and others.
RigRite has part numbers on their site for the entire assembly, and the components.
1/2" Navtec U-Bolt Chainplate Assembly: Nav UBA-8S-2.5:
Navtec 1/2" U-Bolt Chainplate Assembly bolts through Deck to special Tie-rod Block which accepts SS tie-rod at a specific angle. Formed, flattened SS U-Bolt has 1/2" thread with 2 1/8" between centers, and extends 2 1/2" below deck surface. Note that some units were produced extending only 1" or 2" below deck, these are no longer stocked, but can be produced by cutting the longer ones, if necessary. Assembly includes U-Bolt with SS Top and bottom plates, lock washers and nuts. As used on a variety of boats including Bristol, Cal, C&C, Ericson, O'Day, Southern Cross, and others.
More info can be found here: U-Bolt Type Chainplates
Note: I have no interest in Rig Rite. I am only trying to help expedite someone else's search.
I have decided that the backing block pictured in my earlier post is "good enuf" and that the visible corrosion is cosmetic and not structural. Once the plate is rebedded correctly (if this cold weather ever
) I believe that the block will be fine. Should I ever need it, Rigrite sells this block too;
3/8" U-Bolt Chainplate Tie-rod Block: Nav UB-6S-TRB-__:
Tie-rod Block for single 3/8" U-Bolt Chainplate. Anodized Aluminum Tie-rod Block is 2 9/16" long x 1 1/2" wide x 5/8" thick, with (2) recessed holes for nuts and washers, and a machined socket for 3/8" cold-headed tie-rod. Note: These items were produced with the socket machined for a wide variety of simple and compound tie-rod angles, please specify.