Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-05-2021, 01:25 PM   #1
Veteran Member
 
Steveg353's Avatar
 
City: Seabrook TX
Vessel Name: Osprey
Vessel Model: Marine Trader
Join Date: Apr 2013
Posts: 41
Going Nuts

I am looking for stainless nuts that will thread onto the threaded rod that holds the the shaft packing flange. The threaded rod appears to be 1/2" but no 1/2" nuts will fit on the rod. My boatyard guy told me that the nuts are probably Tyshing thread pattern and standard or metric 1/2" nuts will not work.
Is this a common problem and are these nuts available somewhere?
Boat is a 1988 Marine Trader 38, twins, ADC135s
__________________
Advertisement

Steveg353 is offline   Reply With Quote
Old 03-05-2021, 01:37 PM   #2
Guru
 
GoneFarrell's Avatar
 
City: La Conner, WA
Vessel Name: Imagine
Vessel Model: Farrell 34
Join Date: Oct 2015
Posts: 528
Do you have the old nuts to go on a thread matching hunt?
__________________

GoneFarrell is offline   Reply With Quote
Old 03-05-2021, 01:45 PM   #3
Guru
 
City: gulf coast
Join Date: Jun 2014
Posts: 3,441
Ifall else ails you can retread the rod to SAE, not perfect but will work especially if the threads are similar in pitch.

I think the nuts should be bronze. If you can get a tap of the correct tread you could also rethread bronze nuts.
bayview is offline   Reply With Quote
Old 03-05-2021, 01:53 PM   #4
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,314
If like mine, they are British Whitworth or British standard thread. Several threaded rods on my boat were.


The rod diameter is like SAE but the threads are different...that's why an SAE nut will thread on part way nicely, but only part way.



Got them from the same place as pictured below as shipping from Britain for some nuts was like $35.


You can google "Trawler forum british standard thread" and several threads discusss this. This is the one that the second link below is from...


https://www.trawlerforum.com/forums/...uts-48779.html







link:
https://britishfasteners.com/nuts/st...teel-nuts.html
Attached Images
 
psneeld is offline   Reply With Quote
Old 03-05-2021, 01:58 PM   #5
Veteran Member
 
Steveg353's Avatar
 
City: Seabrook TX
Vessel Name: Osprey
Vessel Model: Marine Trader
Join Date: Apr 2013
Posts: 41
I do have a couple of the old nuts that are still in ok shape. I have been to a couple fastener shops and they cannot match.
Steveg353 is offline   Reply With Quote
Old 03-05-2021, 02:16 PM   #6
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,314
Quote:
Originally Posted by Steveg353 View Post
I am looking for stainless nuts that will thread onto the threaded rod that holds the the shaft packing flange. The threaded rod appears to be 1/2" but no 1/2" nuts will fit on the rod. My boatyard guy told me that the nuts are probably Tyshing thread pattern and standard or metric 1/2" nuts will not work.
Is this a common problem and are these nuts available somewhere?
Boat is a 1988 Marine Trader 38, twins, ADC135s



"Tyshing thread pattern"???.... Even Google didn't recognize that one.


Sure that wasn't just another Taiwan Trawler joke?
psneeld is offline   Reply With Quote
Old 03-05-2021, 03:23 PM   #7
Guru
 
City: gulf coast
Join Date: Jun 2014
Posts: 3,441
Get a pitch gauge and calipers to measure he current threads so that you know what you are looking for.
bayview is offline   Reply With Quote
Old 03-05-2021, 05:02 PM   #8
TF Site Team
 
Comodave's Avatar
 
City: Au Gres, MI
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 11,167
Have you tried McMaster Carr? They might have something that will fit.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
Comodave is offline   Reply With Quote
Old 03-05-2021, 06:04 PM   #9
Guru
 
AlaskaProf's Avatar
 
City: Tacoma, WA & Ashland, OR
Vessel Name: SEEADLER
Vessel Model: RAWSON 41
Join Date: Jun 2016
Posts: 1,474
Quote:
Originally Posted by Steveg353 View Post
I do have a couple of the old nuts that are still in ok shape. I have been to a couple fastener shops and they cannot match.

Tacoma Screw! You might need to send them an example, but they've never failed me.
AlaskaProf is offline   Reply With Quote
Old 03-05-2021, 06:17 PM   #10
TF Site Team
 
Larry M's Avatar
 
City: Jacksonville
Vessel Model: Haven't found it yet
Join Date: Nov 2008
Posts: 9,660
We had a 1981 Taiwanese build and went through the same thing on the rudder packing gland. During reassembly, after repairing the rudder, we had lost one of the nuts. I was in major boat yard and what it came down to was the threads were not standard from anywhere. We recut the threads. It wasn’t the right way but it was on the rudder. It was during the time that Taiwan was putting out the boats and were making their own hardware, unfortunately.
Larry M is offline   Reply With Quote
Old 03-05-2021, 09:14 PM   #11
Veteran Member
 
Steveg353's Avatar
 
City: Seabrook TX
Vessel Name: Osprey
Vessel Model: Marine Trader
Join Date: Apr 2013
Posts: 41
So, the nuts and threaded rod is British standard (thanks psneeld). I can order some 304ss @ $4.65 each. Would that be a waste of $$$ or should I try to find 316ss?
Steveg353 is offline   Reply With Quote
Old 03-05-2021, 09:18 PM   #12
Guru
 
GoneFarrell's Avatar
 
City: La Conner, WA
Vessel Name: Imagine
Vessel Model: Farrell 34
Join Date: Oct 2015
Posts: 528
So long as the stud and nut are different alloys, you should be OK. 316 will usually be more "stain less."
GoneFarrell is offline   Reply With Quote
Old 03-09-2021, 10:10 AM   #13
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,314
Quote:
Originally Posted by Steveg353 View Post
So, the nuts and threaded rod is British standard (thanks psneeld). I can order some 304ss @ $4.65 each. Would that be a waste of $$$ or should I try to find 316ss?

They may not be the only US supplier, but the only only I could find easily and for $20 worth of nuts at the time, wasn't worth looking further.


If worried about corrosion, slather them in corrosion blocking something.
__________________

psneeld is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 08:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×