Rivet Bolts for Gussets and Rear Crossmember

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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Bob Shaw
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Post by Bob Shaw » Sun Apr 10, 2005 9:58 pm

Yeah,Jim

It's hanging from the Power-Wagon.

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Post by Mighty Eighth » Mon Apr 11, 2005 8:25 am

Those are slick. :wink: gary
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Post by sfowler » Fri Dec 09, 2005 3:19 pm

I paid $25 for them at the Gilbert military show in PA. No shipping. I think there was 8 in the bag.. Hope this helps.

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Post by sfowler » Fri Dec 09, 2005 3:20 pm

I paid $25 for them at the Gilbert military show in PA. No shipping. I think there was 8 in the bag.. Hope this helps.

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Post by iowa » Tue Oct 17, 2006 9:36 am

i just ordered 16 of these!!
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Post by Bob Shaw » Tue Oct 17, 2006 2:17 pm

I hope you like them as much as I do.
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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by douglasmthom » Mon Jan 14, 2013 6:04 am

Does anyone know the manufacturer of these Rivet Bolts? I'd like to get more information than Brent Mullins seems to have.
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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by Marty, SoCal » Mon Jan 14, 2013 6:26 am

Here are some questions I would ask:

At what torque reading do these rivet bolts snap off at during installation?

What effective grade strength are these?

Anyone ever have one fail to pull the parts together before they snapped during installation?

Any failures of these on the stressed parts like the spring hanger?

The threads on these look like they are 5/16" fine, not sure if I would trust them for securing the suspension, or other critical parts. Regular 3/8" rivets, Huck rivets or grade eight 3/8" SAE fine bolts would be much stronger, and have better clamping ability, in my opinion. Button head 3/8 SAE bolts are inexpensive, and will hold the proper torque. The hex can be filled in with epoxy, body filler or welded over to simulate the round rivet head.

Anyone know what was used for repairs at the overhaul facilities during the war, or post war? Replacement hot rivets, or bolts?

What was the approved motor pool repair for say a bumper bracket or spring hanger?
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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by thidisbogus » Tue Jan 15, 2013 7:32 pm

As far as I know Brent seems to be the only one that has them, so must have some exclusive relationship with the manufacturer.

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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by douglasmthom » Wed Jan 16, 2013 6:35 am

For applications like the spring hanger, I'm inclined to agree with Marty. It is the shearing off of the Brent Mullin rivet-bolts that make me nervous about their ultimate strength, as well as the fact that this shearing apparently occurs before the clamping force of the threads really gets to work. I'm sure these are fine in some jeep applications and I like their look, but for high stress and load cycling spots like the spring hanger I think I'm going to try the SAE button head cap screws where I know with some certainty what the fastener materials are capable of doing AND I can take advantage of all the clamping force of the fasteners.

I'd be happy to be convinced otherwise, but since we can't seem to get our hands on the manufacturer of the rivet-bolts to understand their characteristics, my engineering conservatism is taking hold....
Doug Thom

Chassis GPW 84536 - DOD: December 9, 1942 Dallas, TX
Engine GPW 89702 - early January 1943
Hood Number (est.) 20192259
MVPA 34210, MVCC 12569

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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by gearhead » Wed Jan 16, 2013 7:09 am

I have been involved in maintenance, repair, fabrication for about 40 years.
Last 30+ years in aviation as my primary vocation.
I know the importance of proper strength fasteners.
Some of the "shear rivet/bolts" are much better than others. I don't really like them much.
An option some have used are these type button head bolts in the needed size, http://www.grainger.com/Grainger/NUCOR- ... Pid=search" onclick="window.open(this.href);return false;.
One can lock-tite the threads and weld the allen recess for a rivet look.
I have the tools and prefer to use solid rivets on my projects.
I do realize not everyone has the tools to use rivets, or welding equip.

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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by douglasmthom » Fri Feb 01, 2013 7:34 am

Here is the family of fasteners I ended up using for the high working stress rivet applications - available from McMaster-Carr in many sizes. I used them in conjunction with a locking nut and grade 8 SAE washers. They look very much like a riven head once the hex is filled in and painted and these are strong fasteners with a high quality thread, so you car get some serious clamping force from them.
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Doug Thom

Chassis GPW 84536 - DOD: December 9, 1942 Dallas, TX
Engine GPW 89702 - early January 1943
Hood Number (est.) 20192259
MVPA 34210, MVCC 12569

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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by thovis » Fri Feb 01, 2013 7:17 pm

I can answer a couple of these questions.... (I started this thread back in 2005)

1) Brent Mullin is the designer and manufacturer of these bolts. Nobody sells them other than Brent (at least that is what he told me at tower park his last year he came)
2) Since the front gussets (should) have welds to the frame (top and bottom), the stress on these psuedo rivets should be minimal.
3) I am nine years with these installed, and look the same from the day they were installed
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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by douglasmthom » Wed Feb 06, 2013 4:27 pm

For those who may be interested in the button cap bolt solution here is what can be done to get the "rivet look" by filling in the hex hole in the head. The OD and profile of the bolt head are VERY close the 3/8" rivet. I installed these bolts sandwiching the frame, gusset, and spring hangers and really cinched them down with washers and locknuts. I'm glad I could really tighten these down as there was still some twisting in the horns after welding and once the bolts were tightened everything trued up. Then I welded the lower gussets top and bottom per the factory spec. It turned out very clean.
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Doug Thom

Chassis GPW 84536 - DOD: December 9, 1942 Dallas, TX
Engine GPW 89702 - early January 1943
Hood Number (est.) 20192259
MVPA 34210, MVCC 12569

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Re: Rivet Bolts for Gussets and Rear Crossmember

Post by Dan S » Thu Mar 28, 2013 1:16 pm



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