Bolt Size ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kens65fb · 07-06-2020, 02:33 PM

What size bolts are used to attach the front fenders, to the inner fenders ?

**The Rocknrod** · 07-06-2020, 03:08 PM

5/16"-18 X 3/4" Large flange dog point. But unless you buy used ones, good luck. I used the following:
https://www.ebay.com/itm/10-5-16-18x...MAAOxyJX1TE5dM

kens65fb · 07-06-2020, 04:30 PM

Quote:

Originally Posted by The Rocknrod

5/16"-18 X 3/4" Large flange dog point. But unless you buy used ones, good luck. I used the following:
https://www.ebay.com/itm/10-5-16-18x...MAAOxyJX1TE5dM

Are these bolts stainless, if not how are they holding up.

**The Rocknrod** · 07-06-2020, 06:07 PM

No they are not. Zinc coated I think. There are some similar "looking" but not large flanges - https://www.flangebolts.com/shop/5-1...ss-steel-22647

Rust-O-Matic · 07-08-2020, 05:01 PM

I used these on mine:

https://www.summitracing.com/parts/GMK-HWB2001

**mongocanfly** · 07-08-2020, 08:31 PM

I use the same style Rod showed ..but in stainless...I got them from Mcmaster-carr..
https://www.mcmaster.com/screws/hex-...x-head-screws/

**The Rocknrod** · 07-09-2020, 11:53 AM

Quote:

Originally Posted by mongocanfly

I use the same style Rod showed ..but in stainless...I got them from Mcmaster-carr..
https://www.mcmaster.com/screws/hex-...x-head-screws/

Those are nice. They aren't "Large Flange" like the originals, but nice none the less.

**mongocanfly** · 07-09-2020, 02:08 PM

Yep..I used these on my IH...the flange is the same dia as the original IHs were, should have added that I guess...
but I used a flat washer under each bolt to keep the knurles from tearing up my new paint..a 5/16 ss flat washer is nearly the same dia as the bolt flange...

**The Rocknrod** · 07-09-2020, 02:13 PM

SAE or USS washers?

**62bagger** · 07-09-2020, 07:12 PM

I just bought a front fender bolt package from LMC that I have not used it yet. are these the right bolts?
https://www.lmctruck.com/1960-66-che...eel-body-parts

**The Rocknrod** · 07-09-2020, 07:19 PM

http://67-72chevytrucks.com/vboard/s...d.php?t=716799
And you can view the Lambrecht thread for reference: http://67-72chevytrucks.com/vboard/s...d.php?t=603021

**mongocanfly** · 07-09-2020, 07:30 PM

I'm not sure on the washers Rod...the bolt flange is 11/16" and the washer of is 3/4"..
I just grabbed some ss washers...didn't pay any attention to what they were

07-06-2020, 02:33 PM	#1
kens65fb Registered User Join Date: Dec 2018 Location: Dallas, PA Posts: 551	Bolt Size ? What size bolts are used to attach the front fenders, to the inner fenders ?

07-06-2020, 03:08 PM	#2
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Bolt Size ? 5/16"-18 X 3/4" Large flange dog point. But unless you buy used ones, good luck. I used the following: https://www.ebay.com/itm/10-5-16-18x...MAAOxyJX1TE5dM __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-06-2020, 06:07 PM	#4
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Bolt Size ? No they are not. Zinc coated I think. There are some similar "looking" but not large flanges - https://www.flangebolts.com/shop/5-1...ss-steel-22647 __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-08-2020, 05:01 PM	#5
Rust-O-Matic Registered User Join Date: Apr 2015 Location: Gallatin, MO Posts: 295	Re: Bolt Size ? I used these on mine: https://www.summitracing.com/parts/GMK-HWB2001

07-08-2020, 08:31 PM	#6
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,662	Re: Bolt Size ? I use the same style Rod showed ..but in stainless...I got them from Mcmaster-carr.. https://www.mcmaster.com/screws/hex-...x-head-screws/ __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by The Rocknrod; 07-09-2020 at 11:53 AM.

07-09-2020, 02:08 PM	#8
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,662	Re: Bolt Size ? Yep..I used these on my IH...the flange is the same dia as the original IHs were, should have added that I guess... but I used a flat washer under each bolt to keep the knurles from tearing up my new paint..a 5/16 ss flat washer is nearly the same dia as the bolt flange... __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

07-09-2020, 02:13 PM	#9
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Bolt Size ? SAE or USS washers? __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-09-2020, 07:12 PM	#10
62bagger Senior Member Join Date: Mar 2016 Location: Sonora California Posts: 283	Re: Bolt Size ? I just bought a front fender bolt package from LMC that I have not used it yet. are these the right bolts? https://www.lmctruck.com/1960-66-che...eel-body-parts

07-09-2020, 07:19 PM	#11
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Bolt Size ? http://67-72chevytrucks.com/vboard/s...d.php?t=716799 And you can view the Lambrecht thread for reference: http://67-72chevytrucks.com/vboard/s...d.php?t=603021 __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?

07-09-2020, 07:30 PM	#12
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,662	Re: Bolt Size ? I'm not sure on the washers Rod...the bolt flange is 11/16" and the washer of is 3/4".. I just grabbed some ss washers...didn't pay any attention to what they were __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

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