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Interpreting the Assembly Manual

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Old Jun 26, 2021 | 09:26 PM
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Default Interpreting the Assembly Manual

I just finished renewing my driver seat. 1968 New cushion, springs, rods ETC. After taking it apart I found a lot of screws holding things on. The bottom seat latch bar, rubber snubber, the bracket that the seat adjuster rod runs through. After getting it apart I noticed that all of these were threaded. I found the correct BOLT sizes that fit all of these. They are all much tighter after the correct bolts were installed. I wondered why someone would put SCREWS in all these places. I checked my Factory Assembly Manual and sure enough they were all referred to as "screws". Even the large bolt that the seat back pivots on, is called a screw. These are clearly not screws. I can see someone trying to follow the original specs, getting all "screwed" up. Nice to have a seat sitting higher so I can see over the dash.
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Old Jun 26, 2021 | 10:45 PM
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On my 1973 there are some instances where the instructions/parts are not correct as stated in the AIM. I believe the books were being changed and new pages were added/deleted frequently throughout the assembly year. Also, remember that a number of items were shipped to St. Louis already assembled, and were only attached to the car on the assembly line. The most common example is Early or Late Model Builds. While the AIM illustrations, notes, and part numbers are extremely helpful, there are instances where mistakes were made.
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Old Jun 26, 2021 | 10:57 PM
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I also wonder if terminology has changed in 50 years. To me a bolt has machined/cut threads, while a screw is like a deck screw with a pointy end.
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Old Jun 27, 2021 | 08:30 AM
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Terminology hasn't changed. there is more than one kind of screw. perhaps you missed that fastener course in high school.
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Old Jun 27, 2021 | 08:42 AM
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bolt is an incorrect term we all use. it is a hex head cap screw. and i think the AIM was the first document farmed out to india. they didn't know what to say so they just drew pictures...
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Old Jun 27, 2021 | 08:43 AM
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What you and I and 99.999% of hardware store customers call 'bolts' are technically a variety of 'cap screw'.

Oops - I see derek just posted the same...

Last edited by Catfish4818; Jun 27, 2021 at 08:45 AM.
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Old Jun 27, 2021 | 08:43 AM
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You need to know the difference between a "capscrew" and a "bolt".
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Old Jun 27, 2021 | 08:45 AM
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Big screw,,, small screw,,, long screw,,,, short screw,,, stainless screw,,, wood screw,,, chrome screw,,, But none of them are bolts.
I guess I didn't get this course in school.
The point is to be aware of what you are reading and be careful how you restore something.

Last edited by kodpkd; Jun 27, 2021 at 09:43 AM.
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Old Jun 27, 2021 | 08:49 AM
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Originally Posted by kodpkd
Big screw,,, small screw,,, long screw,,,, short screw,,, stainless screw,,, wood screw,,, chrome screw,,, But none of them are bolts.
I guess I didn't get this course in school.
https://www.youtube.com/watch?v=-PSSYGohhN0
Nice video...but it was produced by one of the 99.999%ers...
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Old Jun 27, 2021 | 08:58 AM
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They call this a "Cap Screw" To me this is a "Bolt".
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Old Jun 27, 2021 | 09:04 AM
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Originally Posted by kodpkd
They call this a "Cap Screw" To me this is a "Bolt".
Yep, and I call it a bolt, too.

And if you and I were working together on one of our vettes, I would NEVER EVER say 'please hand me that 3/8" cap screw over there".
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Old Jun 27, 2021 | 01:34 PM
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Easy way to see the difference - capscrew is on the right. Small washer face on the underside of capscrew head helps fastener turn as you fully tighten it. Bolts are tightened at the other end (nut) so the washer face under the head is not there.
Both of these have same thread diameter and pitch.
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Old Jun 27, 2021 | 01:41 PM
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my frame extensions. some have welded in nuts. on those they are screws and the one next to it that i put a nut on they are bolts? if i switch them do they change names?
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Old Jun 27, 2021 | 02:35 PM
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Bolts have only a portion of their shank length threaded; screws have their entire shank length threaded. Some folks define bolts as threaded fasteners requiring a nut on the other end, and screws as fasteners which do not require a nut.
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Old Jun 27, 2021 | 04:52 PM
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If I drop a deuce, is it a t*rd, a stool, a poop, a sh*t, or something else?

Asking for a friend...
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Old Jun 28, 2021 | 09:50 PM
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The point of this discussion is to help someone that is trying to restore/repair something on their vet. When we find conflicting information it makes things more difficult than it needs to be, not to mention making your head explode.

This is a picture of the 2 "screws" that I removed from my seat frame. The middle one is what fit the original thread size in the seat frame. Obviously the middle "screw" is a much more secure fit. It came from an assortment of stove bolts.
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