The Ford Barn

TagMan · 03-23-2012, 04:03 PM

I received a repro front spring center bolt from a vendor and the square head is only 7/32" height (original is 5/16"), the bolt diameter is .024" smaller than O.E. and the nut is only thick enough (.165") for about 3 threads of engagement.

Does anyone make a center bolt in the correct dimensions?

Vic Piano · 03-23-2012, 04:14 PM

Try Roy Naciwitz (spelling) I'm sure someone on the forum will have his contact information.

TagMan · 03-23-2012, 06:15 PM

Thanks, Vic. I'll try to find his contact info.

TJ · 03-23-2012, 07:47 PM

Try; www.fordbolts.com.

TagMan · 03-23-2012, 09:01 PM

TJ, thanks very much. Sounds like he's got the correct stuff. Hard to believe what some vendors are passing off as reproduction parts.

1931 flamingo · 03-23-2012, 10:56 PM

Sponsored Links (Register now to hide all advertisements)

Tagman: And your vendor was???? Let the rest of us know so we don't make a mistake.
Paul in CT

34pickup · 03-24-2012, 09:24 AM

Quote:

Originally Posted by 1931 flamingo

Tagman: And your vendor was???? Let the rest of us know so we don't make a mistake.
Paul in CT

Yeah, I would like to know too. It could save us money. If we quit buying crap that we can't use maybe they will get the message. It couldn't cost more to have made the bolt the proper dimensions.

TagMan · 03-24-2012, 10:34 AM

I got, what appears to me to be, the incorrect bolt from MAC's. It was only $1.50 which should have warned me. I'd gladly pay $5.00 for the correct one. Why peddle crap that isn't correct?

TagMan · 10-09-2012, 08:16 AM

Just a follow up to my original post.

Maybe this is a common 'fix', but I'm new to early Fords, so maybe I'm 'reinventing the wheel' here, but in any case, I thought I'd share:

I bought another center bolt from Ray Nacewicz. My first dealings with him and he was a pleasure to work with. He forwarned me that the center bolt he sells does not have the stock "high head". I ordered several items and included the center bolt.

When I installed the bolt, the head would not go through the cross member like it should, so I considered several options. I decided to try drilling out the threads of a like-sized square nut, so it could be pressed onto the shaft of the screw.

I reassembled the center bolt and installed the spring pack. The head of the bolt now stands a bit above the cross member, like the original did, and the added spacer nut doesn't show.

Here's a few pics. (Note: I believe the clamping U-bolts should not be plated, but this is my personnal prefference.)

The added nut spacer:

As assembled:

Lawson Cox · 10-09-2012, 10:14 AM

Neat idea.

Pete · 10-09-2012, 01:02 PM

I know restrorers need to have an authentic looking center bolt so you are stuck with Chinese junk if you buy a new one unless you have a machine shop and make one from 4340 bar stock.
I have seen way too many broken center bolts over the years so not being into show car restorations, I use grade 9 socket head bolts and make the hole in the cross member fit the bolt head. Grade 9's are 180 ksi tensile and I doubt one would ever break unless on purpose.

Ken/Alabama · 10-09-2012, 03:04 PM

One thing I don't understand is why the front bolt is 5/16 and the rear is 3/8 dia

Pete · 10-09-2012, 03:12 PM

The front is smaller so doesn't need as big a bolt.

TagMan · 10-09-2012, 04:01 PM

After the spring is installed, I doubt the center bolt really does much, considering the hefty clamps & U-bolts securing the spring pack to the cross member. I believe the real purpose for the center bolt is to hold the spring pack together and center it in the cross member during assembly.

Just my 2¢

19Fordy · 10-09-2012, 05:00 PM

Quote:

Originally Posted by Pete

I know restrorers need to have an authentic looking center bolt so you are stuck with Chinese junk if you buy a new one unless you have a machine shop and make one from 4340 bar stock.
I have seen way too many broken center bolts over the years so not being into show car restorations, I use grade 9 socket head bolts and make the hole in the cross member fit the bolt head. Grade 9's are 180 ksi tensile and I doubt one would ever break unless on purpose.

Actually, I think Henry used lots of fasteners made of low carbon (grade 5) steel so that they would stretch and bend rather than just "snap" and break off upon impact. It would be interesting to know the type of steel those OEM bolts are made of.

TagMan · 10-09-2012, 06:13 PM

Grade 8 (or 9) bolts will hold long after grade 5 bolts (of the same size) stretch and snap or shear. Look up the tensile strength & shear strength of bolts. Grade 8 are not more brittle than grade 5 bolts.

03-23-2012, 04:03 PM	#1
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Front Spring Center Bolt I received a repro front spring center bolt from a vendor and the square head is only 7/32" height (original is 5/16"), the bolt diameter is .024" smaller than O.E. and the nut is only thick enough (.165") for about 3 threads of engagement. Does anyone make a center bolt in the correct dimensions?

03-23-2012, 04:14 PM	#2
Vic Piano Senior Member Join Date: May 2010 Location: Odessa, FL Posts: 7,611	Re: Front Spring Center Bolt Try Roy Naciwitz (spelling) I'm sure someone on the forum will have his contact information. __________________ Imagination is more important than knowledge.

03-23-2012, 06:15 PM	#3
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt Thanks, Vic. I'll try to find his contact info.

03-23-2012, 07:47 PM	#4
TJ Senior Member Join Date: May 2010 Location: Napa,California Posts: 6,566	Re: Front Spring Center Bolt Try; www.fordbolts.com.

03-23-2012, 09:01 PM	#5
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt TJ, thanks very much. Sounds like he's got the correct stuff. Hard to believe what some vendors are passing off as reproduction parts.

03-23-2012, 10:56 PM	#6
1931 flamingo Senior Member Join Date: May 2010 Location: new britain,ct 06052 Posts: 9,428	Re: Front Spring Center Bolt Sponsored Links (Register now to hide all advertisements) Tagman: And your vendor was???? Let the rest of us know so we don't make a mistake. Paul in CT

03-24-2012, 10:34 AM	#8
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt I got, what appears to me to be, the incorrect bolt from MAC's. It was only $1.50 which should have warned me. I'd gladly pay $5.00 for the correct one. Why peddle crap that isn't correct?

10-09-2012, 08:16 AM	#9
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt - Follow Up Just a follow up to my original post. Maybe this is a common 'fix', but I'm new to early Fords, so maybe I'm 'reinventing the wheel' here, but in any case, I thought I'd share: I bought another center bolt from Ray Nacewicz. My first dealings with him and he was a pleasure to work with. He forwarned me that the center bolt he sells does not have the stock "high head". I ordered several items and included the center bolt. When I installed the bolt, the head would not go through the cross member like it should, so I considered several options. I decided to try drilling out the threads of a like-sized square nut, so it could be pressed onto the shaft of the screw. I reassembled the center bolt and installed the spring pack. The head of the bolt now stands a bit above the cross member, like the original did, and the added spacer nut doesn't show. Here's a few pics. (Note: I believe the clamping U-bolts should not be plated, but this is my personnal prefference.) The added nut spacer: As assembled:

10-09-2012, 10:14 AM	#10
Lawson Cox Senior Member Join Date: May 2010 Location: Above the gnat line in Georgia Posts: 7,082	Re: Front Spring Center Bolt Neat idea. __________________ Life is like a roll of toilet paper. The closer to the end, the faster it goes. It is better to be seen, than viewed. "We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".

10-09-2012, 01:02 PM	#11
Pete BANNED Join Date: May 2010 Location: Wa. Posts: 5,423	Re: Front Spring Center Bolt I know restrorers need to have an authentic looking center bolt so you are stuck with Chinese junk if you buy a new one unless you have a machine shop and make one from 4340 bar stock. I have seen way too many broken center bolts over the years so not being into show car restorations, I use grade 9 socket head bolts and make the hole in the cross member fit the bolt head. Grade 9's are 180 ksi tensile and I doubt one would ever break unless on purpose.

10-09-2012, 03:04 PM	#12
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,395	Re: Front Spring Center Bolt One thing I don't understand is why the front bolt is 5/16 and the rear is 3/8 dia

10-09-2012, 03:12 PM	#13
Pete BANNED Join Date: May 2010 Location: Wa. Posts: 5,423	Re: Front Spring Center Bolt The front is smaller so doesn't need as big a bolt.

10-09-2012, 04:01 PM	#14
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt After the spring is installed, I doubt the center bolt really does much, considering the hefty clamps & U-bolts securing the spring pack to the cross member. I believe the real purpose for the center bolt is to hold the spring pack together and center it in the cross member during assembly. Just my 2¢

10-09-2012, 06:13 PM	#16
TagMan Senior Member Join Date: Jul 2011 Location: Alvaton, Kentucky, USA Posts: 970	Re: Front Spring Center Bolt Grade 8 (or 9) bolts will hold long after grade 5 bolts (of the same size) stretch and snap or shear. Look up the tensile strength & shear strength of bolts. Grade 8 are not more brittle than grade 5 bolts.