Control arm u bolts size - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bean · 02-14-2019, 12:32 PM

Redoing my front-end and need to replace those I bolts. Does anyone know what size they are? Was hoping to find them locally. Thanks

**71CHEVYSHORTBED402** · 02-14-2019, 01:36 PM

Quote:

Originally Posted by bean

Redoing my front-end and need to replace those I bolts. Does anyone know what size they are? Was hoping to find them locally. Thanks

If C10 they were originally 7/16" or 1/2", though it's good idea to replace them with 9/16", which you'll find on a C20. 9/16" may be a pinch too large to fit through the hole, but a little filing will do it.

bean · 02-14-2019, 02:28 PM

Thanks a lot!

68 P.O.S. · 02-14-2019, 02:29 PM

The 7/16" & 1/2" u-bolts had a problem with snapping when in reverse with the wheel cranked all the way in either direction. I've had it happen myself. The 9/16" u-bolts are an excellent safety upgrade. You may need to use a 9/16" drill bit to open the stock holes a bit.

sprint_9 · 02-14-2019, 02:59 PM

Dorman sells a nice kit, used them on mine.

https://www.dormanproducts.com/p-1632-13503.aspx

wpavlis · 02-14-2019, 03:42 PM

I got the 9/16 ones from NAPA. They had to order them but it only took a couple days. They i think the set of 4 cost me what 2 cost from LMC.

GASoline71 · 02-14-2019, 03:56 PM

Got the 9/16" Dorman U-bolt kit from Summit Racing. One thing they didn't come with was washers, so I had to source those locally.

Gary

**71CHEVYSHORTBED402** · 02-15-2019, 02:01 AM

I found super nice washers for these, they're more narrow than most you'll find, so they won't get bent up on the cross member. Only downside is they're real expensive, they're very proud of their washers

They're finished like ARP bolts. Oh yeah, be sure to use prevailing torque nuts.

02-14-2019, 12:32 PM	#1
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Control arm u bolts size Redoing my front-end and need to replace those I bolts. Does anyone know what size they are? Was hoping to find them locally. Thanks

02-14-2019, 02:28 PM	#3
bean Registered User Join Date: Jun 2002 Location: Fort Worth, TX Posts: 920	Re: Control arm u bolts size Thanks a lot!

02-14-2019, 02:29 PM	#4
68 P.O.S. Registered User Join Date: Jan 2007 Location: Puyallup, WA Posts: 1,662	Re: Control arm u bolts size The 7/16" & 1/2" u-bolts had a problem with snapping when in reverse with the wheel cranked all the way in either direction. I've had it happen myself. The 9/16" u-bolts are an excellent safety upgrade. You may need to use a 9/16" drill bit to open the stock holes a bit. __________________ 72 C10 lwb fleetside -stock 350/350 combo

02-14-2019, 02:59 PM	#5
sprint_9 Registered User Join Date: Nov 2012 Location: 9 Posts: 862	Re: Control arm u bolts size Dorman sells a nice kit, used them on mine. https://www.dormanproducts.com/p-1632-13503.aspx

02-14-2019, 03:42 PM	#6
wpavlis Registered User Join Date: Oct 2015 Location: San Tan Valley, Arizona Posts: 313	Re: Control arm u bolts size I got the 9/16 ones from NAPA. They had to order them but it only took a couple days. They i think the set of 4 cost me what 2 cost from LMC.

02-15-2019, 02:01 AM	#8
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,325	Re: Control arm u bolts size I found super nice washers for these, they're more narrow than most you'll find, so they won't get bent up on the cross member. Only downside is they're real expensive, they're very proud of their washers They're finished like ARP bolts. Oh yeah, be sure to use prevailing torque nuts. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025



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