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521 Cotter Pin / Bolts


Coop

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Lots of Spridget guys here. Who knew...?

 

Mike Klotz said he ordered a handfull to measure for himself. I guess we'll find out soon enough.

 

FWIW - I don't even own a Datsun anymore. I just hang out and try to help where I can.

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8 hours ago, Stoffregen Motorsports said:

Lots of Spridget guys here. Who knew...?

 

Mike Klotz said he ordered a handfull to measure for himself. I guess we'll find out soon enough.

 

FWIW - I don't even own a Datsun anymore. I just hang out and try to help where I can.

Are you saying you are a troll?  LOL

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For what it is worth, the early 620 with a kingpin front end use the same cotter pin/bolt except the threads and nut which are metric.

 

Also the 320 collumn shift levers on the outside of the transmission are held in position on the shafts by these same cotter pins/bolts.

 

Mike is correct, I told him when I take the nut off I remove the lock washer and then put the nut back on far enough to put another nut on the end of the pin/bolt and I lock them together leaving the top nut so the end of the pin/bolt are slightly countersunk, this leaves about a lock washer gap as I recall, then I take a punch and put it in the countersunk part and I firmly tapped on it till it moved, then I would back the nuts off a little bit at a time and keep tapping until it was loose, a few times I did not have enough bolt left to use 2 nuts so I had to use only one nut in this process keeping the end of the pin/bolt in the countersunk hole the nut makes, the nut protects the threads from mushrooming, this did not work every time, but I saved more than I lost.

 

So it appears the 320 all the way until the 620 was changed over to the ball joints are the same, but I only checked out a few 620s in the wrecking yards, so i don't know all the 620 trucks with kingpin front ends use this cotter pin/bolt, it is just a educated guess they do, I only removed them pins from a couple of them and I don't remember what years they were, but as I recall all the pins I removed from a 620 were black and appeared to be of a better metal as none of them got ruined removing them that I recall. 

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7 hours ago, Charlie69 said:

Are you saying you are a troll?  LOL

 

Trolls are never helpful. lol

 

I got the first one in already and it's way smaller.  One down, 3 more sets to go.  I'm thinking that the next two will be the same as this set, but maybe that last set I ordered will be right.

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Wayno is correct....the threads switch to metric on the cotter bolts, but the dimensions of the bolt itself are the same.  I'm pretty sure I've already bought the nylocs, so I'll do the threads to match the nuts.....either 1/4-20 or M6x1.00.

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The correct cotter bolt is an M8 with a M6x1.00 thread or a 5/16" with a 1/4-20 thread.  This first set is a 1/4" bolt....I'll have to measure it.  Another set showed up just now.....I'll check them in the morning.  Once they've all shown up, I'll do a comparison and post a photo or two.

 

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try moss motor sports,  select shop by model select the 100, 100-6, 3000  from left side menu select suspension then front suspension.  i purchased the fulcrum pin part 65 and it is a direct replacement for the datsun fulcrum pin (for my 521).  the other parts associated with the fulcrum pin may work also they appear to be the same or similar.

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29 minutes ago, debbheff@gmail.com said:

try moss motor sports,  select shop by model select the 100, 100-6, 3000  from left side menu select suspension then front suspension.  i purchased the fulcrum pin part 65 and it is a direct replacement for the datsun fulcrum pin (for my 521).  the other parts associated with the fulcrum pin may work also they appear to be the same or similar.

 

Great description on how to find it. Thanks!  I just took a look.....the pins look like they're the same, but the nuts on either side are not.  Replacing just the pin should eliminate half of any wear.  The cotter bolts look a bit different, but I've already got those on order.

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Since the cotter bolts are tied in with the kingpin rebuilding, I thought I'd put this link here.  This is page 5 of a rebuild thread I did on Ratsun.net.  There's info here about the fulcrum pin seals.

 

 

Near the bottom, oldskoolvws posted a link to a MGB option that works.  I ordered the equivalent seals with one of my cotter bolt orders....they came in as cork seals.....which may work for the older 520/320 connections.  Maybe someone knows of a similar seal that is a bit smaller.

http://britishpartsdirect.com/index.php?route=product/product&filter_name=aaa1323&product_id=811

 

 

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13 hours ago, mklotz70 said:

Since the cotter bolts are tied in with the kingpin rebuilding, I thought I'd put this link here.  This is page 5 of a rebuild thread I did on Ratsun.net.  There's info here about the fulcrum pin seals.

 

 

Near the bottom, oldskoolvws posted a link to a MGB option that works.  I ordered the equivalent seals with one of my cotter bolt orders....they came in as cork seals.....which may work for the older 520/320 connections.  Maybe someone knows of a similar seal that is a bit smaller.

http://britishpartsdirect.com/index.php?route=product/product&filter_name=aaa1323&product_id=811

These seals work I have used them.

 

 

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I'll try to do a video fairly soon.  I just got the other 4 pieces in from the last recommendation......they're the ones.  In fact, the four of them are cheaper shipped than I can make/ship them for......so I will NOT be making them.  I'm going to contact them about ordering a bunch to go with the kingpin kits, but I will not be reselling them by themselves. I'd have to mark them up and my shipping is a lot more.  I'll post the info for them on my site when I post the kingpins for sale.

 

https://mossmotors.com/pin-cotter-unf?assoc=135520

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On 4/11/2021 at 8:42 AM, mklotz70 said:

I'll try to do a video fairly soon.  I just got the other 4 pieces in from the last recommendation......they're the ones.  In fact, the four of them are cheaper shipped than I can make/ship them for......so I will NOT be making them.  I'm going to contact them about ordering a bunch to go with the kingpin kits, but I will not be reselling them by themselves. I'd have to mark them up and my shipping is a lot more.  I'll post the info for them on my site when I post the kingpins for sale.

 

https://mossmotors.com/pin-cotter-unf?assoc=135520

Just ordered a few, thanks so much! I can't believe this was figured out so quickly. 

Thanks, 

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Just posted a vid on my youtube channel with the info.  The info is also on IG and FB now, but I can find it on YT more easily down the road.

 

 

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Huge shout out to Stoffregen Motorsports for providing links to the cotter bolt options!!!  Big thanks to debbheff and Coop for the info on the fulcrum pins and seals.  

 

When I get a chance, I'll link this thread on my site and post up the kingpin kits I have available.  The shims I had on order came in yesterday.  Since the cotter bolts are available thru Moss Motors, I'll be able to post up the kingpins soon, rather than waiting until I get them made.  

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I was thinking about how Moss doesn't have 100 of them and considering making them if they run out.  Then it dawned on me that they're probably not the only supplier. lol  I found a couple of other places that show having them.  A couple of the places have a minimum order which is inconvenient when you only want two $4 bolts.  I'm tempted to order a few dozen to include with the kingpin kits.  I'm also looking at small anti-seize ampules, too.  I have lots of anti-seize around here, but someone else may not want to buy a $30+ tube/tub of it.  I'll have to think about that and research it some more, but for now, I'll put links to the other places I've found for the cotter bolts.

 

https://www.englishparts.com/products/14423/661-890.html

 

https://www.lbcarco.com/cgi-bin/or17?nextform=/orderinprogress.html&o=9757533.22966143147&p=

 

In the UK... https://www.ahspares.co.uk/austin-healey/big-healey/suspension-front/cotter-pinnut-king-pin.aspx

 

This one was found using the factory Part# and says it's for the clutch fork.  https://britishcarspecialists.com/store/product.php?product_id=170&backtoshop_url=http%3A%2F%2Fbritishcarspecialists.com%2Fstore%2Findex.php%3Fcategory%3DCLUTCH%26subcategory%3DHOUSING

 

Even thought to look in Australia. lol  https://britishclassicspareparts.com.au/british-vehicle-parts/suspension/cotter-pin-austin-healey-1004-1006-3000-bn1-bj8-austin-a40-a60-devon-cambridge-freeway-a70-a90

 

 

The loctite I'm looking at....

https://www.rshughes.com/p/Loctite-LB-8008-Anti-Seize-Lubricant-2-G-Pouch-51299-IDH-234302/079340_51299/

 

I think that ought to do.   Seriously, the main reason I did this is so that I can refer back to it later. lol  :)  Looks like there's plenty of sources available....I don't see any reason to make them.  Now the question is do I order a bunch for the kits?

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