Author Topic: Front Seat Hinge / Pivot Bolts?  (Read 3443 times)

Offline filmsurgeon

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Front Seat Hinge / Pivot Bolts?
« on: February 11, 2013 - 04:27:56 PM »
Hi guys.  I have a 1970 Challenger and am getting back into correcting and fixing a bunch of little problems that the previous owner did during his "restoration".  At the moment, I am looking for the special pivot bolts that are used to attach the front bucket seat backs to the seat bottoms.  I have one correct bolt and 3 poor replacements.  I have a attached a photo of the one correct/good bolt (sitting next to the hinge/bracket it goes into).  Thanks for your help.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.




Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #1 on: February 14, 2013 - 01:09:13 AM »
Hi Guys,

Can anyone help me out with this? Any help would be greatly appreciated.

Thanks.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline 72cudamaan

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #2 on: February 14, 2013 - 08:47:14 AM »
Hi Guys,

Can anyone help me out with this? Any help would be greatly appreciated.

Thanks.

I'll take a look this afternoon.
If I cant fix it, it's broke
 
Andy  (phukker whither)

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #3 on: February 14, 2013 - 12:37:23 PM »
I'll take a look this afternoon.

I really appreciate that.  I have scoured the internet looking for these special bolts, but cannot find them.  Even checked many sites that sell only fasteners and hardware.  I know I could substitute alternative bolts/collars, but would rather have the correct hardware (even though they're not visible once the seat hinge covers go on).  I saw an older ebay listing that had ended, but the bolts looked pretty badly rusted.
« Last Edit: February 14, 2013 - 12:40:09 PM by filmsurgeon »
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline FY1Cuda

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #4 on: February 14, 2013 - 02:57:39 PM »
Will some seat belt bolts work?  I know that the Mopar seat belt bolts are fine thread and that your picture shows a coarse thread, but others might work.  GM bolts on Summit are 7/16" coarse. The collar doesn't look thick enough.
http://www.summitracing.com/parts/oer-sb193/media/images
I think your best bet is to snoop around a Pick n Pull and find any old Mopar with hinged seats.  I bet they're the right bolt.
« Last Edit: February 14, 2013 - 03:04:16 PM by FY1Cuda »

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #5 on: February 14, 2013 - 06:18:49 PM »
Will some seat belt bolts work?  I know that the Mopar seat belt bolts are fine thread and that your picture shows a coarse thread, but others might work.  GM bolts on Summit are 7/16" coarse. The collar doesn't look thick enough.
http://www.summitracing.com/parts/oer-sb193/media/images
I think your best bet is to snoop around a Pick n Pull and find any old Mopar with hinged seats.  I bet they're the right bolt.


Yes, I saw those on Summit, but doesn't look like they'll work 'cause the shoulder is the wrong size.  No close pic n pull places near me in Los Angeles area.  Thanks anyway though.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline 72cudamaan

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #6 on: February 15, 2013 - 08:27:26 AM »
Well I only found 2. But I see that you posted elsewhere and found some. Good for you.
If I cant fix it, it's broke
 
Andy  (phukker whither)

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #7 on: February 15, 2013 - 01:45:54 PM »
Well I only found 2. But I see that you posted elsewhere and found some. Good for you.

That's for checking Andy.  Yes, someone on the moparts.org message board has what I need.  He and I are currently working out the details.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #8 on: February 23, 2013 - 02:19:24 PM »
This might be a rather tough question, but does anyone know the reason for the difference between these two seat hinge bolts?  When I took the seats out of my '70 Challenger and took the backs off the bottoms, I had a mix of hinge bolts (something that was done by the prior owner).  I had what I believed to be one correct bolt (see photo in first post).  I received three used bolts yesterday from someone who restores seat belts and their bolts.  He said he took them off of a '70 vehicle with high-back bucket seats.  In the following attached photos, one of his three bolts is on the left, and my one bolt (that I believe to be correct) is on the right.  His "shoulder" is 5/8" high, while mine is 1/2" high.  His is stamped with the letter "N", mine has an "SB" cast in the head.  Were these bolts used in different model/year Mopars?  Are either one of them correct for a '70 Challenger with high-back bucket seats?  Also, I had what I believed to be one correct washer for the hinge bolt.  It is steel and slightly concave and measures approximately 1-1/2" diameter x 3/32" thick, with a 1/2" center hole.  The gentlemen was kind enough to send me three "washers" as well (says they were also from a '70 vehicle with high-back buckets).  They appear to be made of a "fiber" material, and are completely different in size.  Which type/size of washer was used with the hinge bolt on a '70 Challenger?  My steel washer looks to be correct and functional, or is the fiber washer correct?  I know that these bolts and washers were used in many of the models during that era, but any knowledge you can share about the applications for these is greatly appreciated.  Thanks.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #9 on: February 26, 2013 - 02:58:42 AM »
Can anyone shed any "light" on my previous post regarding bolt and washer differences?  Thanks.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #10 on: March 04, 2013 - 02:17:23 AM »
I thought I'd share an update on my quest for "correct" seat hinge bolts.  I continued to Google search for the bolts.  I came across an expired (08/2012) ebay listing for 4 bolts and washers that the seller described as follows: "Up for your auction is this good used set of four bucket seat hinge bolts and washers that I believe came off a 1972-74 era Challenger or Barracuda / Cuda.  I think these may work on all 1970-74 E-bodies, and possibly some of the B-bodies from this era too ...).  The ebay listing had no buyer.  So, I contacted the seller, and he quickly responded with detailed info (BTW - he was awesome to deal with).  He still had them, and offered to sell them to me for the "starting bid" price + shipping ($18.75 total).  After some email communication (sharing specifics about our bolts and washers), I decided to buy them.  He ended up sending (4) bolts (that match my one bolt that I believed to be correct), (4) washers (that match my one washer that I believed to be correct), and (4) other washers that are larger in diameter with a unique bossing at the center hole.  Does anyone know what the correct washer is for E-Bodies?  I don't know if earlier years used something different than the later model years.  Apparently, there were also "fiber" (or panel board) washers used WITH the larger steel washers.  See link below.

http://www.classicindustries.com/mopar/parts/md2030.html

I had previously received original "fiber" washers from another person (mentioned in my previous post) that fit the backside of the larger steel washer perfectly.  Hence, the fiber washer would go between the steel washer and the seat cover to protect the material.

The 1st two photos show my bolt and washer on the far left, and the (4) matching bolts and washers to the right.  The 3rd and 4th photos show my bolt and washer on the left, and a matching bolt with the larger 2" diameter washer.  The 5th photo shows my steel washer on the left (1-7/16" diameter), and the 2" diameter steel washer in the middle.  Notice the bossing around the center hole to "center" the fiber washer (which is on the right, and has a larger diameter center hole to fit the bossing).  Can anyone share any insight?  Thanks.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.

Offline filmsurgeon

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Re: Front Seat Hinge / Pivot Bolts?
« Reply #11 on: March 08, 2013 - 12:42:52 PM »
See previous post with photos.  Regarding the washer used with seat hinge bolt:  Which one is correct?  Notice the bossing around the center hole of the 2" diameter washer to "center" the fiber washer (which is on the right, and has a larger diameter center hole to fit the bossing).  Can anyone share any insight?  Thanks.
1970 Challenger Convertible (JH27N0B); Resto-Mod; 605 HP, 412cid Small Block; Holley 750CFM Carburetor; A-833 23-spline 4-SPD; A-body 8.75 rear-end w/3.55 gears; 3" mini-tub; leaf spring relocation kit with split-leaf mono and Caltracs; American Racing AR500 Wheels, Rears = 15x10 (5.5" BS) with 315/60-15 BFG Comp T/A Drag Radials; Fronts = 15x7 (3.5" BS) with 215/70-15 BFG Radial T/A Radials.