Posted By: HemiGreg
440 bolts - 05/08/13 04:52 PM
what size is the head of factory converter to flex plate bolts (4) thanks
440 bolts
Posted By: JohnRR
Re: 440 bolts - 05/08/13 05:29 PM
I want to say 9/16, it is a 5/16 thread bolt which normally has a 1/2 head , but I think because of how thin they are they are the next wrench size up ?????
Posted By: HemiGreg
Re: 440 bolts - 05/08/13 09:11 PM
Posted By: buildanother
Re: 440 bolts - 05/09/13 06:12 AM
I'm gonna agree with John that they have 9/16" heads and are 5/16" fine thread bolts. A little unique to the old mopars...maybe newer ones too. 
Posted By: 1_WILD_RT
Re: 440 bolts - 05/09/13 06:37 AM
Yup...
Posted By: MoparforLife
Re: 440 bolts - 05/09/13 01:27 PM
Yep factory flexplate is 5/16 with a odd 9/16 head.
Posted By: demonH1B
Re: 440 bolts - 05/09/13 03:01 PM
Unless you are working with a Hemi converter, they use 7/16 bolts.
Some hi-stall after market converters use 7/16, as well. All others
are 5/16.
I believe there are bolt kits available from Mopar and others
with the thin head bolts.
Some hi-stall after market converters use 7/16, as well. All others
are 5/16.
I believe there are bolt kits available from Mopar and others
with the thin head bolts.
Posted By: babarracuda
Re: 440 bolts - 05/09/13 04:05 PM
Flex plate bolts have a 3/4" head. The factory bolts had 5/16 thread and after market has 3/8 both with fine thread
Posted By: JohnRR
Re: 440 bolts - 05/09/13 04:38 PM
Quote:
Flex plate bolts have a 3/4" head. The factory bolts had 5/16 thread and after market has 3/8 both with fine thread
The bolts that hold flexplate to the crank have 3/4 heads , the flexplate to convertor are 9/16 in the case of an engine with it's original convertor.
the original question
Quote:
what size is the head of factory converter to flex plate bolts (4) thanks