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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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| | | | Joined: Aug 2005 Posts: 442 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 442 | Is there a reason they used castle nuts on the rear cab mount shackles? I bought some at the hardware store, right threads, but they are longer than the factory nuts. Okay to use as is, or could they be replaced with regular nuts. Thanks, Mike | | | | | Joined: Mar 2008 Posts: 3,750 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 3,750 | I'm not sure why castle nuts were used as the bolts didn't have corresponding holes for split pins,at least the ones on mine weren't and as far as I know there were the originals.
Are the new nuts longer than the threads on the bolts?
Ideally there should be some exposed thread once the nuts are tightened down fully.
If not i'd be tempted to get either slightly longer bolts or shorter nuts,nylocs would be even better.
1950 Chevy Advance Design 3100 in ScotlandIn the Stovebolt GalleryMore pix on Flickr. I've definately got this truck thing in my blood ... my DNA sequence has torque settings"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.
| | | | | Joined: Aug 2005 Posts: 442 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 442 | Mine are original too, perhaps there is a reason unknown to us. The threads are all under the threads, so should be good. thanks for the reply | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | While these may appear similar to castellated nuts they are actually Webster self-locking nuts which predate the nylon lock nuts now produced. They are still available in certain places (see link). They are also used on carb studs, shifter arms, exhaust studs, etc. https://www.pegasusautoracing.com/productdetails.asp?RecID=3984 | | | | | Joined: Mar 2010 Posts: 10,286 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,286 | What Brad said. And if they don't go on tight once you reach the castle part of the threads, you can put the nut in a vise and tap on those castle peaks to restore their locking ability.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Aug 2005 Posts: 442 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 442 | Thanks for the info Brad, I would have never thought! The new ones are nice and tight, not going anywhere, should be good in my book. Mike | | |
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