What size bolt is this? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Aaron0731 · 07-08-2017, 12:57 AM

In the bottom right I'm looking for info on what size bolt that connects the negative battery to the chassis. Would like bolt and tap size.

Thanks

CamaroFred · 07-08-2017, 06:26 AM

What size is the head? What socket fits it?

1/2" head is usually 5/16 bolt, 9/16 head will probably be a 3/8".

Take it out and walk over to the hardware store, they can match it up.

christianchevell · 07-08-2017, 09:10 AM

Just pull the bolt its holding down a crappy wire harness plastic piece and on my car I cleaned up the threads and sanded so it would ground better....Take bolt to fastener store..if your thinking its causing some problem...? the deal is a small piece of flat bar steel tapped is in there welded to the trunk floor pan...very common bolt I believe its national coarse.

Rock-It Man · 07-08-2017, 10:14 AM

Quote:

Originally Posted by CamaroFred

What size is the head? What socket fits it?

1/2" head is usually 5/16 bolt, 9/16 head will probably be a 3/8".

Take it out and walk over to the hardware store, they can match it up.

I expect it's metric, like everything else on the car.

Spurshot · 07-08-2017, 11:04 AM

Quote:

Originally Posted by CamaroFred

What size is the head? What socket fits it?

1/2" head is usually 5/16 bolt, 9/16 head will probably be a 3/8".

Take it out and walk over to the hardware store, they can match it up.

There are virtually no American UNC or UNF bolts on our GM car bodies/chassis. There hasn't been in decades. This shift was started in the 1970s. It is a metric bolt. Likely a 6mm (approx. 1/4") or 8mm (approx. 5/16") thread. The body/chassis bolts are most commonly the course thread.

blake-b · 07-08-2017, 11:28 AM

M6x1 threads (I think)

07-08-2017, 12:57 AM	#1
Aaron0731 Drives: 2010 2SS/RS L99 Join Date: Oct 2015 Location: Fort Wayne, IN Posts: 295	What size bolt is this? In the bottom right I'm looking for info on what size bolt that connects the negative battery to the chassis. Would like bolt and tap size. Thanks Attached Images

07-08-2017, 06:26 AM	#2
CamaroFred Drives: Miss Con Ception Join Date: Aug 2016 Location: Chicagoland Posts: 2,998	What size is the head? What socket fits it? 1/2" head is usually 5/16 bolt, 9/16 head will probably be a 3/8". Take it out and walk over to the hardware store, they can match it up. __________________ 2011 1SS/RS LS3 CGM

07-08-2017, 09:10 AM	#3
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	Just pull the bolt its holding down a crappy wire harness plastic piece and on my car I cleaned up the threads and sanded so it would ground better....Take bolt to fastener store..if your thinking its causing some problem...? the deal is a small piece of flat bar steel tapped is in there welded to the trunk floor pan...very common bolt I believe its national coarse. __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

07-08-2017, 11:28 AM	#6
blake-b Drives: 2009 ZR1 Join Date: May 2010 Location: KCMO Posts: 3,205	M6x1 threads (I think) Last edited by blake-b; 07-08-2017 at 11:40 AM.