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Where can I get rear endcap bolts?
#1416343 Thu Jul 08 2021 05:19 PM
Joined: Nov 2005
Posts: 146
W
'Bolter
The ’47 panel truck bed wood has a strip across the rear that is held on with 10 bolts. From what I have found these bolts are called Countersunk carriage bolts aka 114 deg countersunk square neck bolts aka Flat square neck plow bolts. This is a ¼” bolt maybe ¼-20, and about 1 ¼” long.
I’m missing one and another is bent. I have found some on-line that don’t match the dimensions, so I’ll go to the local fastener supply places next. I thought someone here might have a source. Thanks.

Attached Files
RearEndcapBolt.jpg (112.88 KB, 261 downloads)

1947.2 Chevy Panel Truck 1 ton
1955.2 Chevy Suburban
1955.2 Chevy 6700 Bus/RV
Re: Where can I get rear endcap bolts?
walterhvogel #1416359 Thu Jul 08 2021 08:31 PM
Joined: Mar 2010
Posts: 604
B
Curmudgeon
I couldn't find them either.
From what I have read at other websites, some are using stainless Torx flathead bolts.
The reason being, removing the old bolts with the square on the neck simply spin in old wood (no grip).
Have to grind the bolt off from the bottom of the bed.
If you want the look of original, find someone who is good with a lathe and have at least 10 of them so they look the same.

Re: Where can I get rear endcap bolts?
walterhvogel #1416378 Thu Jul 08 2021 11:40 PM
Joined: May 2015
Posts: 4,178
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
These [mcmaster.com] are very similar, but the angle on the head is slightly different.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Where can I get rear endcap bolts?
walterhvogel #1416405 Fri Jul 09 2021 03:31 AM
Joined: Mar 2010
Posts: 604
B
Curmudgeon
The head diameter looks almost 1-1/8" judging my the steel tape in the background.
It would take a 5/8" plow bolt to get to that diameter.

Re: Where can I get rear endcap bolts?
walterhvogel #1416427 Fri Jul 09 2021 01:51 PM
Joined: Feb 2019
Posts: 2,087
P
AD Addict
If you look closely at the angle under the head, it is closer to a plow bolt.

Looking at picture two, I zoomed the picture to closely match one inch on the scale, then I measured the head size in picture three. You’ll see that the head size is closer to 5/8”.

However, MSC doesn’t carry plow bolts that small (1/4”-20) nor have I found any place on line that does.

I would post an ad in the” Truck Parts Wanted” forum. I’ve had very good luck getting what I need from fellow ‘bolters. Good Luck!

Attached Files
C8D60DE1-A4D3-4150-A69E-2162B7B81D6F.jpeg (123.31 KB, 185 downloads)
C51AE1B2-5281-4D1F-AA36-198B683C43BE.jpeg (176.41 KB, 181 downloads)
CE0AC0E2-CE14-43A7-A5E6-2E7D8D724C76.jpeg (228.16 KB, 181 downloads)
Last edited by Phak1; Fri Jul 09 2021 02:13 PM.

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Re: Where can I get rear endcap bolts?
walterhvogel #1416449 Fri Jul 09 2021 04:26 PM
Joined: Nov 2005
Posts: 146
W
'Bolter
The 114 degree part may or may not be right, I did see some bolts called 100 degree, I think that's the angle of the countersink. I may be able to use elevator bolts, but I'll keep looking for plow bolts. I also checked on the Grainger website, didn't see any that small. I did find something that might work if I wanted 1,200 of them:
https://www.globalindustrial.com/p/...9-avW8QIVQRB9Ch1jegjiEAQYASABEgIvbfD_BwE
I'd like to see if it fits before buying especially that quantity. Now I feel like I should take the endcap with me when I go searching. I didn't know there were bolts there they sit flush and just blend in nicely. Today I will go by the local Fastenal and see if they have something:
https://www.fastenal.com/products/details/0110615
This is 5/8" long and not a catalog item, may have to have some made? The problem with on-line catalogs is they don't contain some odd bits that you might find in a dusty bin at a retail location.


1947.2 Chevy Panel Truck 1 ton
1955.2 Chevy Suburban
1955.2 Chevy 6700 Bus/RV
Re: Where can I get rear endcap bolts?
walterhvogel #1416658 Sun Jul 11 2021 11:41 PM
Joined: Mar 2010
Posts: 9,765
5
'Bolter
Could a guy just take a regular carriage bolt and grind the top flat and weld a 5/8" OD washer on top?

Re: Where can I get rear endcap bolts?
walterhvogel #1416670 Mon Jul 12 2021 12:47 AM
Joined: May 2005
Posts: 8,328
B
Sir Searchalot
I don't know what the "strip" is or does. It was not defined and pictured. I always try to search pics on the internet . It may be a trim strip running left to right at the rear end of the wood.
I don't know if it is removable or not.
I guess these weird bolts hold down the strip.
Walter: I believe in this case I would not dwell on finding this bolt. I would do something that would enable a standard bolt. Something available everywhere. A stove bolt, a carriage bolt, a round head bolt. I don't think it NEEDS to be a flat head bolt. I don't believe it NEEDS to have a square shoulder under the head. So I would do one of the following:
1. Take off the strip.
2. Weld up the hole, at least at the top.
3. (A) Drill a thru hole only........ or (B) drill and countersink to match a standard countersink.
4. Use a standard round head carriage bolt. Grind off the corners of the square.
5. Use a standard flathead carriage bolt. Grind off the corners of the square.

No. 3A/4 being my preference.

Some folks here could find brass 1/4 square bar, insert it into the strip's square hole, and then weld around it to eliminate the "114 deg" countersink while maintaining the square hole in the strip. Then use a standard round head carriage bolt or countersink it for a standard flathead carriage bolt.

Last edited by bartamos; Mon Jul 12 2021 06:26 AM.

Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
I used to think beer was bad for me, so I gave up thinking.
Sometimes no nonsense makes sense, in a sense.
You can't teach a new dog old tricks.
Honk if you're Amish


Re: Where can I get rear endcap bolts?
walterhvogel #1416976 Wed Jul 14 2021 07:55 PM
Joined: Nov 2005
Posts: 146
W
'Bolter
Those are some good suggestions. Yes it is a trim strip at the rear of the bedwood. None of the bedwood holes are square and this strips bolts do not go through the wood. The ten bolts go through the strip, the end hole on each rub rail, and the lower ledge the wood rests on. I measured the countersink angle on the bolt and it is 114 degrees. I found a countersink hex bolt and it measures at 70 degrees, the head is smaller, but it would work and could be filled in for a smooth finish. I like the way the original bolts blend in.
I went by Fastenal, but they don’t have any ¼” plow bolts longer than 5/8” listed and they show no suppliers for them. I tried to search farm implement parts, but those seem to be listed by application. If I knew of a specific piece of equipment that uses these, I could reference it.
I just need to find a bolt that looks right when installed. I think I’ll get a flat head carriage bolt and chamfer the edge so it sits flush in the 114 degree countersink. Seems like the easiest solution. I find these bolts are used on garage doors.

Attached Files
RearEndCap.jpg (53.76 KB, 85 downloads)
EndcapBoltHead.jpg (48.55 KB, 85 downloads)

1947.2 Chevy Panel Truck 1 ton
1955.2 Chevy Suburban
1955.2 Chevy 6700 Bus/RV
Re: Where can I get rear endcap bolts?
walterhvogel #1416999 Wed Jul 14 2021 10:52 PM
Joined: May 2005
Posts: 8,328
B
Sir Searchalot


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
I used to think beer was bad for me, so I gave up thinking.
Sometimes no nonsense makes sense, in a sense.
You can't teach a new dog old tricks.
Honk if you're Amish


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