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rockfla · 04-24-2019, 09:29 AM

"General" commercial available SS will not withstand the torque values needed for flathead torques.....I have some 304SS 7-16-20 NF SS Acorn nuts (Maybe 40psi max torque) but have not and will not use them on a Flathead. With that said there "MAY BE" a company offering a "hardened" SS Acorn nut (like ARP) not sure BUT if so they will not be cheap and unless the seller can provide me with certs or mill test reports I would not trust them!!!!

NOTE: The above mentioned McMaster Carr items are the same as I have and IMO I would not recommend. Max torque value is 36ft/lb dry & 27ft/lb lubed. They are the standard commercial variety!!!

04-24-2019, 09:29 AM	#5
rockfla Senior Member Join Date: Mar 2014 Location: Jacksonville FL Posts: 3,957	Re: Nuts! Head nuts.... Acorn? Stainless? "General" commercial available SS will not withstand the torque values needed for flathead torques.....I have some 304SS 7-16-20 NF SS Acorn nuts (Maybe 40psi max torque) but have not and will not use them on a Flathead. With that said there "MAY BE" a company offering a "hardened" SS Acorn nut (like ARP) not sure BUT if so they will not be cheap and unless the seller can provide me with certs or mill test reports I would not trust them!!!! NOTE: The above mentioned McMaster Carr items are the same as I have and IMO I would not recommend. Max torque value is 36ft/lb dry & 27ft/lb lubed. They are the standard commercial variety!!! Last edited by rockfla; 04-24-2019 at 09:38 AM.