Head stud nut diameter
Thread Starter
Drifting
Joined: Aug 2017
Posts: 1,878
Likes: 352
From: Dayton, OH
Head stud nut diameter
I would like to know the outside diameter of a 8 mm and half inch head stud nuts.
I would be most appreciative if someone could measure them for me.
Thanks!
I would be most appreciative if someone could measure them for me.
Thanks!
Last edited by SteveJewels; Sep 12, 2022 at 07:50 AM.
Burning Brakes
Joined: Aug 2014
Posts: 1,239
Likes: 257
From: Tampa FL
Would bet by this time " NOTHING " on the car is measured in SAE/inch.
https://www.aboveboardelectronics.co...41_259-300.pdf
https://www.aboveboardelectronics.co...41_259-300.pdf
Thread Starter
Drifting
Joined: Aug 2017
Posts: 1,878
Likes: 352
From: Dayton, OH
Thanks for posting the table @HK770 ! It is a good start
I am actually looking for measurements of ARP stud nuts as I will be using them for my build. They may differ from bolt heads or not be a standard size.
1/2" studs are rather common for FI builds and pretty much universal in billet blocks.
Granted, the diameter of the nut is not a dimension that one is usually concerned with.
The heads I have chosen for my build have clearance holes for 1/2" studs. The block I am using is threaded for 8 mm studs. The nuts for 8 mm studs are smaller than those for 1/2" studs so there will be less contact area under the nut for an 8 mm stud vs that for a 1/2" stud. This will result in more force per SqIn applied to the cylinder head if they are both torqued to the same force. I am looking to calculate the differance in force.
Mostly it is an intellectual exercise and I will have the block tapped for 1/2" studs but as an engineer (although electrical) these sort of things interest me.
I am actually looking for measurements of ARP stud nuts as I will be using them for my build. They may differ from bolt heads or not be a standard size.
1/2" studs are rather common for FI builds and pretty much universal in billet blocks.
Granted, the diameter of the nut is not a dimension that one is usually concerned with.
The heads I have chosen for my build have clearance holes for 1/2" studs. The block I am using is threaded for 8 mm studs. The nuts for 8 mm studs are smaller than those for 1/2" studs so there will be less contact area under the nut for an 8 mm stud vs that for a 1/2" stud. This will result in more force per SqIn applied to the cylinder head if they are both torqued to the same force. I am looking to calculate the differance in force.
Mostly it is an intellectual exercise and I will have the block tapped for 1/2" studs but as an engineer (although electrical) these sort of things interest me.
Last edited by SteveJewels; Sep 12, 2022 at 05:16 PM.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
Thanks for posting the table @HK770 ! It is a good start
I am actually looking for measurements of ARP stud nuts as I will be using them for my build. They may differ from bolt heads or not be a standard size.
1/2" studs are rather common for FI builds and pretty much universal in billet blocks.
Granted, the diameter of the nut is not a dimension that one is usually concerned with.
The heads I have chosen for my build have clearance holes for 1/2" studs. The block I am using is threaded for 8 mm studs. The nuts for 8 mm studs are smaller than those for 1/2" studs so there will be less contact area under the nut for an 8 mm stud vs that for a 1/2" stud. This will result in more force per SqIn applied to the cylinder head if they are both torqued to the same force. I am looking to calculate the differance in force.
Mostly it is an intellectual excercise and I will have the block tapped for 1/2" studs but as an engineer (although electrical) these sort of things interest me.
I am actually looking for measurements of ARP stud nuts as I will be using them for my build. They may differ from bolt heads or not be a standard size.
1/2" studs are rather common for FI builds and pretty much universal in billet blocks.
Granted, the diameter of the nut is not a dimension that one is usually concerned with.
The heads I have chosen for my build have clearance holes for 1/2" studs. The block I am using is threaded for 8 mm studs. The nuts for 8 mm studs are smaller than those for 1/2" studs so there will be less contact area under the nut for an 8 mm stud vs that for a 1/2" stud. This will result in more force per SqIn applied to the cylinder head if they are both torqued to the same force. I am looking to calculate the differance in force.
Mostly it is an intellectual excercise and I will have the block tapped for 1/2" studs but as an engineer (although electrical) these sort of things interest me.
Thread Starter
Drifting
Joined: Aug 2017
Posts: 1,878
Likes: 352
From: Dayton, OH
Thank you for the reply @torquetube .
I found several sets of instructions online but no mention of washer size.
I sent a message to ARP from their site.
I called Dart yesterday and found out the fastener holes in the heads are sized for 7/16ths studs. Glad I asked.
I found several sets of instructions online but no mention of washer size.
I sent a message to ARP from their site.
I called Dart yesterday and found out the fastener holes in the heads are sized for 7/16ths studs. Glad I asked.
Last edited by SteveJewels; Sep 13, 2022 at 03:47 AM.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
Thank you for the reply @torquetube .
I found several sets of instructions online but no mention of washer size.
I found several sets of instructions online but no mention of washer size.
https://cdn2.arp-bolts.com/instructi...ped-washer.pdf
Thread Starter
Drifting
Joined: Aug 2017
Posts: 1,878
Likes: 352
From: Dayton, OH
Last edited by SteveJewels; Sep 18, 2022 at 08:32 PM.
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