Dually guys, need your opinions!

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

bluex

bluex

Full Access Member
Joined
May 9, 2013
Posts
1,967
Reaction score
2,563
Location
Spartanburg SC
First Name
Paul
Truck Year
1978
Truck Model
C15
Engine Size
350
Who would buy a kit of rear fender bolts? Would you prefer it per fender, a kit for both fenders, individual bolts? What would that be worth to you in each option?

I can't find these anywhere an I'm looking at having some made for 73-98 but it's a steep initial buy in an waaayyyy more than I'd ever need.

You must be registered for see images attach


Help me help the community to avoid this!

You must be registered for see images attach
 
legopnuematic

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
2,444
Reaction score
6,181
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
What diameters/thread pitch are the ends? Is the one end for a thread cutting nut?

Oh and overall length?
 
PrairieDrifter

PrairieDrifter

Full Access Member
Joined
Dec 28, 2014
Posts
3,831
Reaction score
5,599
Location
North Dakota
First Name
Mason
Truck Year
84,79,77,76,70,48
Truck Model
Suburban k10, bonanza k10, k30, k20, c10, gmc 1/2ton
Engine Size
350, 350, 350, 350, 350, 350
I've never messed with dually fenders but I would probably just do nutserts(rivnuts) then use your favorite flavor of bolts.
 
R

Ricko1966

Full Access Member
Joined
Apr 11, 2017
Posts
5,341
Reaction score
8,514
Location
kansas
First Name
Rick
Truck Year
1975
Truck Model
c20
Engine Size
350
I've never messed with dually fenders I'm assuming the coarse end threads into threaded inserts in the bed. Then fenders bolt to the finer threads with the spacer locating the fenders. I would investigate tapping the coarse inserts to a common thread,using common studs and making the locating spacers to fit on the studs,if I couldn't find appropriate washers to use as the spacers. My .02
 
Last edited:
bluex

bluex

Full Access Member
Joined
May 9, 2013
Posts
1,967
Reaction score
2,563
Location
Spartanburg SC
First Name
Paul
Truck Year
1978
Truck Model
C15
Engine Size
350
legopnuematic said:
What diameters/thread pitch are the ends? Is the one end for a thread cutting nut?

Oh and overall length?
Click to expand...

One side is 5/16-18, the other is thread cutting into the fiberglass of the fender. OL is about 2"

PrairieDrifter said:
I've never messed with dually fenders but I would probably just do nutserts(rivnuts) then use your favorite flavor of bolts.
Click to expand...

Rivnuts would bust the fiberglass when you try to set/crimp them. The holes into the fender are blind. I guess you could epoxy a rivnut in but then you would have a tough time installing them. The studs give you something to "hang" them on while you go between the inner an outer bedside to put on the nuts/washers. Same problem with epoxy some all thread, what do you in the future when they are damaged?

Ricko1966 said:
I've never messed with dually fenders I'm assuming the coarse end threads into threaded inserts in the bed. Then fenders bolt to the finer threads with the spacer locating the fenders. I would investigate tapping the coarse inserts to a common thread,using common studs and making the locating spacers to fit on the studs,if I couldn't find appropriate washers to use as the spacers. My .02
Click to expand...

No the corse side threads into a boss molded into the fender an cuts its own threads. The standard 5/16 side goes through a hole in the bedside then you put on a nut an washers. There is a gap guard installed after to try an keep road debis off them but it apparently doesn't work very well.
 
legopnuematic

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
2,444
Reaction score
6,181
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
Thank you, I can find 1/4” or 6mm pretty easily. Your example on the right looks to be a “hilo” thread form.

These are 1/4, might be worth to contact them and see if they can source 5/16”. 8mm would likely work too.
You must be registered for see images attach


Catalog here on Delta PT fasteners
You must be registered for see images attach
 
bluex

bluex

Full Access Member
Joined
May 9, 2013
Posts
1,967
Reaction score
2,563
Location
Spartanburg SC
First Name
Paul
Truck Year
1978
Truck Model
C15
Engine Size
350
legopnuematic said:
Thank you, I can find 1/4” or 6mm pretty easily. Your example on the right looks to be a “hilo” thread form.

These are 1/4, might be worth to contact them and see if they can source 5/16”. 8mm would likely work too.
You must be registered for see images attach


Catalog here on Delta PT fasteners
You must be registered for see images attach
Click to expand...
Ya I saw those an thought about asking them too. The one on the right is from 88-98 trucks use a M8x1.25 thread. Worst case an M8 one could work for both generations I think.
 
B

Bennyt

Full Access Member
Joined
May 17, 2019
Posts
1,187
Reaction score
1,822
Location
Surprise
First Name
Ben
Truck Year
1977
Truck Model
C10
Engine Size
350
Depending on cost, I'd be interested in a set just in case. I bought a spare set of dually fenders as those can be hard to source.
 
PrairieDrifter

PrairieDrifter

Full Access Member
Joined
Dec 28, 2014
Posts
3,831
Reaction score
5,599
Location
North Dakota
First Name
Mason
Truck Year
84,79,77,76,70,48
Truck Model
Suburban k10, bonanza k10, k30, k20, c10, gmc 1/2ton
Engine Size
350, 350, 350, 350, 350, 350
Dually fenders are reproduced now.
 
TotalyHucked

TotalyHucked

Full Access Member
Joined
Feb 24, 2020
Posts
3,573
Reaction score
11,489
Location
Auburn, Georgia
First Name
Zach
Truck Year
1985
Truck Model
Sierra 1500
Engine Size
5.3
bluex said:
@TotalyHucked would this be something AMD might have interest in???
Click to expand...
Unfortunately no. We've had many, many conversations about dually fenders and hardware/brackets and I've gotten shut down every time. And I get it, from our standpoint, the amount of sales we'd need vs the tooling costs just don't make sense. And they don't want to do just part of it (say, just hardware) without doing the fenders and brackets and everything.
 
TotalyHucked

TotalyHucked

Full Access Member
Joined
Feb 24, 2020
Posts
3,573
Reaction score
11,489
Location
Auburn, Georgia
First Name
Zach
Truck Year
1985
Truck Model
Sierra 1500
Engine Size
5.3
PrairieDrifter said:
Dually fenders are reproduced now.
Click to expand...
Where? I haven't seen any squarebody dually fenders being re-popped. I've even talked to Mike at SloshTubz about it cuz I think there's enough of a need that he could do it.
 
PrairieDrifter

PrairieDrifter

Full Access Member
Joined
Dec 28, 2014
Posts
3,831
Reaction score
5,599
Location
North Dakota
First Name
Mason
Truck Year
84,79,77,76,70,48
Truck Model
Suburban k10, bonanza k10, k30, k20, c10, gmc 1/2ton
Engine Size
350, 350, 350, 350, 350, 350
TotalyHucked said:
Where? I haven't seen any squarebody dually fenders being re-popped. I've even talked to Mike at SloshTubz about it cuz I think there's enough of a need that he could do it.
Click to expand...
I did a google search a while ago and they popped up. Not sure where or quality.
 
bluex

bluex

Full Access Member
Joined
May 9, 2013
Posts
1,967
Reaction score
2,563
Location
Spartanburg SC
First Name
Paul
Truck Year
1978
Truck Model
C15
Engine Size
350
TotalyHucked said:
Where? I haven't seen any squarebody dually fenders being re-popped. I've even talked to Mike at SloshTubz about it cuz I think there's enough of a need that he could do it.
Click to expand...
Mike is on my list of people to offer this too as well. I'm still not sure if it'll be worth the hassle though.

I got a spare set of fenders for mine a few weeks ago. I was able to pull them myself an I got all the hardware too. So I have a full hardware set, even though they need cleaning up. Hate to be that way, but seems like there's not the demand I thought there would be.

The driving force on this for me was the red squarebody pictured. Most of the hardware on it wasn't salvageable an I'm not crazy about the hanger bolts being a good solution.
 
You must log in or register to reply here.

Similar threads

Old77
Rear 4-link opinions needed
Replies
9
Views
829
BlazerBill
B
9
Suburban leaf spring choice - sagging rear - question on stock ride height
Replies
14
Views
850
bucket
bucket
NickTransmissions
4L80E Information Thread
Replies
11
Views
4K
NickTransmissions
NickTransmissions
B
Crate SBC 350 installation plan
Replies
12
Views
1K
BlazerBill
B
W
Looking for pictures of 16" wheel/tire combos on your lowered truck
Replies
2
Views
2K
JChevy87R10
JChevy87R10

Latest posts

Forum statistics

Threads
44,020
Posts
947,906
Members
36,085
Latest member
jreed92
Top