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Old 24-12-2014, 13:45   #1
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Help finding a 190 mm bolt

Our toerail is leaking and we found the problem(s). We have removed the bolts and some need replacing the only problem is the size. 7.5 inch x 1/4 inch countersunk head in SS with thread only needed at the distal end. That is 190 mm x 6.35 mm for the metric countries. We have looked everywhere we can think of here in the US and no one can help us so far. So happy to buy offshore, anywhere but does anyone know a company that sells this incredibly old and unusual size bolt? Many thanks in advance to all. Fiona
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Old 24-12-2014, 13:49   #2
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Re: Help finding a 190 mm bolt

Possible to use a carriage bolt? It's near flush and I think there are some very long ones...
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Old 24-12-2014, 14:09   #3
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Re: Help finding a 190 mm bolt

Sta-Fast, supplied me with some unusual fasteners when I rebuilt Bluestocking. Bet they'll have them.
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Old 24-12-2014, 18:51   #4
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Help finding a 190 mm bolt

SS All thread, a 1/4 coupler, rounded off and buried in the toerail. Rebung the toe rail to hide the coupler.
Pretty easy. Washer, and Nyloc Nut to hold it firm, on the under side.
Hope that gives you some ideas.
You don't ever have to use the same thing as you've found during dissassembly.


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Old 24-12-2014, 19:25   #5
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Re: Help finding a 190 mm bolt

Try McMaster Carr. They often have unusual stuff. You could also consider coupling nuts to join long bolts with all-thread. Works but messy.
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Old 24-12-2014, 19:52   #6
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Re: Help finding a 190 mm bolt

McMaster has 1/4 SS Carriage bolts to 8" long. They might fit in your tapered recess... fill with sealant. If the Square shank interferes a little you might be able to file the corners off quickly.
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Old 25-12-2014, 08:57   #7
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Re: Help finding a 190 mm bolt

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Hmm that is a lesson on what not to do! I didn't explain myself well at all - it is in fact the sail track ON the toerail. Hence the length and the need for a completely flat head so the track can go over it without catching. But the idea of using threaded rod with a small enough nut on the top so it sits flush with the track is an idea. Thanks everyone and we will contact McMaster Carr once the xmas season is over. Oh and Merry Christmas everyone!
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Old 25-12-2014, 09:07   #8
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Re: Help finding a 190 mm bolt

How about using a hex head bolt, turning or filing it down to size, & cutting a slot into the heat.

Another option might be to simply use the longest bolt which you can find, & epoxy bond it in place, sans nut. If you've got 3"-4" bonded in place, the head of the bolt will tear off before the bolt will come out. Assuming, that is, that the bolt's bonded into something stronger than 6lb Foam.

If the substrata currently isn't of a high enough strength to bond a bolt into, can you replace some of it with something which is? I'm not clear on the why behind the need for such a long bolt. Particularly one so thin for it's length.

There's one catch with bonding it, & that would be getting it out later if you needed to. In which case, bond a shorter bolt in place. One that'll come out once it's heated up good.

Since McMaster-Carr's already been mentioned, how about Jamestown Distributors?
That, or just have one custom made, if having an exact duplicate is critical.
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Old 25-12-2014, 09:12   #9
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Re: Help finding a 190 mm bolt

Custom made to exact specs?

Big Bolt Corporation, fasteners, metric specials, socket cap screws, in-house fabrication, grade 5 tap bolt
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Old 25-12-2014, 10:51   #10
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Re: Help finding a 190 mm bolt

We made our own using a tap and die set with a vice.

How to make your own bolts | Cruising World
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Old 25-12-2014, 10:56   #11
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Re: Help finding a 190 mm bolt

Fastenal will custom make any fastener although if you do not need a large quantity, they would probably be pretty pricey.
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Old 25-12-2014, 11:11   #12
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I win!

what's my prize?

Up to 10"
$12 each

https://www.boltdepot.com/Machine_sc...-8_1_4-20.aspx
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Old 25-12-2014, 12:23   #13
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Re: Help finding a 190 mm bolt

Probably you have already tried but how about the manufacturer of your boat or the members of www.kp44.org —The official website of the Peterson Cutter Owner's Group.
We used to install similar bolts on Sceptre Yachts but I don't think quite as long (same location) so they have to be available somewhere. Maybe Geof the owner would know where to find?? Sceptre Marine - HOME
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Old 25-12-2014, 12:30   #14
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Re: Help finding a 190 mm bolt

If you have access to a welding set, simply weld short CSFH screws to appropriate bits of all-thread. Even if you had to pay a welder, this would be less expensive than 12 bucks each!

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Old 25-12-2014, 14:31   #15
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Re: Help finding a 190 mm bolt

Sanibel Sailor You do win! We will contact them as soon as Christmas is over. We had in fact emailed them but didn't find them on the site so well done you! You win our eternal gratitude and a beer or two if you wish to come to Brunswick? If not and we see you 'out there' it will be whatever drink you want.
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