The Stovebolt Site Forums The Shop Area General Truck Talk Nuts & bolts

Does anyone have a list of the common size bolts in a Ad. 47-55 3100

Whatever you are doing, this is not the correct approach. The list of "common size bolts" used on an AD is the same as a list of "Common size bolts". Mostly UNC and some UNF. If you state the activity you want to perform, it would help. I can't give you my valued opinion until I know what you are doing, if anything.

Sheet metal. Fenders , bed that type of bolt

So are you putting a truck back together? Do you have any of the original hardware? Do you just want to go and buy a bunch without knowing the size, the length.......? Not trying to be a hard A, but tell us what you are actually doing and what pieces you are assembling. You are, at present, being too general. Answer my questions so I can help you get done with whatever you are wanting to do. I could guess, but what good is that? Every part has a different size, finish, pitch, length and head. Sheet metal screws also. Bed bolts could mean holding bed sides and bulkhead together or it could be holding the wood on or the crossmembers or ..........
Hardware is not that hard to figure out. I want to help you, in a general way, to be able to do that. For the future. Truck people need to know how to figure out their own hardware and not try to get a magic list. There is none.
You could, I guess, study a giant old parts manual if it states the full size. Factory Assembly Manuals show the size most times.
But better to learn a few simple ideas.

Understand will get a list on reassembly.

I was still typing,

Sorry please continue

In the assembly manual it gives a part number but when looking number up there is no listing of size

I have read your many posts and see you are mechanically inclined and have taken on many mods and etc. So if I explain how to figure hardware, I would be talking down to you That is not my intention. I would have liked to have had the answers to my questions.

Best solution buy a thread and bolt gauge

You need a tap and die set and a thread gauge comes with it. Calipers for size and length

There's a PARTIAL list HERE.

Good job Kevin!!!!

Still a PITA. You still have to get the PN's off the FAM and then try to find them on the parts list to get the size.
I guess it's something to do on a snowy day.

Unless one is going the Full Concourse route, it doesn't matter that much in terms of exact length or head type.
I can tell you this, there is a boatload of 5/16" UNC nuts and bolts on theses trucks for holding on the sheet metal.

Almost all bolts are NC, coarse thread, so one can eliminate NF, fine thread, bolts from your searching. NF threads are only used for steel, not cast iron parts.

Ed

There are a number of NF bolts used, but mainly on stuff attached to the frame (steering gear, Master cylinder mount, etc.), but you're correct, sheet metal attachment bolts are all coarse thread.

Kevin's list of fasteners has quite a few NF.
Also, I assume the poster has figured out that he can take the PN's in the FAM and cross to Kevin's list. To figure out some of the bolt/screws.
Not what I would do but a viable way.

Of coarse there is always the easy way out and just buy a stainless steel hardware kit from a vendor with everything individually packaged by location (hood, door, fender, bed etc.).

https://www.classicindustries.com/p...jFXriYAixe-pt30Lcs5tWPfG3WhoCA8IQAvD_BwE

Remember if you go the SS route to always put anti-seize on every thread as SS loves to lock up and not come apart.

Mike B

I looked at a few figures on the FAM to try and cross over the PN's to the size on the link, but unfortunately, none of the bolt PN's that I tried matched what was on the parts list.
You can, however successfully cross the nut PN's to sizes, and at least find the diameter and pitch of the corresponding bolt. The parts list also doesn't include any clutch head fasteners, such as the flat head ones I found at the outside ends of the hood brace rods. The Master Parts Catalog does have a parts history section that lists supercessions, but that's too much cross-referencing to be worthwhile (at least to me).

Mike B's Classic Parts link is pretty spendy, but you'd expect that for the time they took to catalog and package everything. Stainless steel is overkill, IMO.

I used SS fasteners everywhere I possibly could on a '52 3100 which I am currently building for a customer. I am saving him a ton of money since I won't be charging him to prep, prime and paint all of those fasteners.

I agree it seems like a lot of money, but there is some value in not having to chase bolts when working on one section of the build and having the stock looking indented head on the bolts where applicable.

Mike B

Maybe you got a low-quality part that caused it to crack. Also, ensure that the armorer wrench is set at a 90° angle to the torque wrench. If you are sure to keep the 90-degree angle, then you need to buy new bolts. Many stories on the internet now specialize in selling building materials. But I recommend you to buy bolts here https://www.scrooz.com.au/, because this online store has long been in this area and, most importantly, sells bolts of quality metals.

Using SS fasteners, remember SS tends to gall, always use some sort of product to prevent SS on SS contact, locker, silicone, etc.

Ed

Here are some products that do not contain silicone.

Silicone will contaminate any future paint jobs - forever.

I bought a bumper to bumper polished stainless steel kit. I has everything in it. 53 3100.

I will say this about the SS set I bought. In the complete set I received - there was not one fine threaded bolt . I needed these to attach the front grill, inner fenders, and fenders to the radiator surround and cab. But this is for a 1941-46 truck and perhaps these SS sets are different for AD series.

I spent time chasing these down at an extra cost (pun not intended).

I ordered the SS set from The Filling Station and was told that they don't expect to see the kits for 8-9 MONTHS! As slow as I have been to finish my project, I don't expect to wait that long.

I've seen some cautionary comments here about SS fasteners tending to degrade, seize and "gall." I thought SS held up better against the elements compared to Non-SS.

Perhaps SS is not worth the price? Or the wait?

Thoughts?

Stainless won't degrade, but if you don't put a little lubricant on the threads, they can gall and the threads will seize. Decent quality zinc plated hardware will work fine, and are a lot less money. The originals were likely zinc plated and lasted over 70 years.