weird seat belt nuts

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mrjohnz

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Sep 12, 2015
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In our '97 Fleetwood the carriage bolts that hold the seat belts under the couch have a weird "nut" on them.

Has anyone seen this before? I am trying to remove 1 set.

The rounded part is on top of the seat belt, the "nut" part is in the basement.

I can access the "nuts" from the compartment.
 
assuming it was just a "normal" nut and bolt...

how were you planning on holding the part that is "under the compartment" from turning  ?

chances are if you crawl around under the coach and stick your arm way up in there you may feel them. but even with professional tools it is likely not going to be a fun job.
Just about everything in a class A motorhome is built on top of something else.

Why are you unbolting the belt ?
 
This is the bottom view - the top is a rounded smooth carriage bolt head.
( hope I attached the pic right!)
 

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it looks like some kind of shouldered nut,    probably specific to the seat-belt industry.

maybe use vice grips
 
Kind of what I was thinking or else grind them off.
we are removing the couch and redoing the floor
 
what about center punching the carriage bolt head and then drill the top off with a 3/8" bit ?

maybe easier because your not on the ground working up ?
 
That's not a "nut" its a huckbolt used by many manufacturers and takes a special press to install.>>>Dan  (I used those in 1965 when working for the Freightliner heavy truck plant)
 
utahclaimjumper said:
That's not a "nut" its a huckbolt used by many manufacturers and takes a special press to install.>>>Dan  (I used those in 1965 when working for the Freightliner heavy truck plant)
Click to expand...

Interesting. I never heard of them

https://www.youtube.com/watch?v=zY_dD0MSXsc
 
utahclaimjumper said:
That's not a "nut" its a huckbolt used by many manufacturers and takes a special press to install.>>>Dan  (I used those in 1965 when working for the Freightliner heavy truck plant)
Click to expand...

That's what I thought it was when I looked at the pic. Didn't realize they came that big. We use them in building aircraft. but the largest I've seen at work is 1/4".

We chisel the collar off when we have to remove them.
 
I'm surprised to see Huck bolts for seat belt anchors and didn't know Fleetwood used them at all back then. Usually they install seat belts and even chair frame anchors with standard nuts and bolts (not even carriage). I wonder if they are doing double-duty, holding that flooring cross member in place as well as anchoring the belts?

I am continually surprised at the tremendous amount of variation in construction methods, even within the same manufacturer. I think they must have somebody in charge of Surprises For Owners, charged with making sure none of us get too complacent in our knowledge!
 
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