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russcc · 04-16-2020, 10:51 AM

Correct KGS, the nuts. If they were the equivalent of grade 5, they would be C32. From my knowledge of the manganese phosphate process, (Parkerizing trademark), the temperatures of the solution are not high enough to affect hardness. I will ask the question why.

04-16-2020, 10:51 AM	#8
russcc Senior Member Join Date: May 2010 Posts: 2,871	Re: Rockwell of Ford head stud nuts Correct KGS, the nuts. If they were the equivalent of grade 5, they would be C32. From my knowledge of the manganese phosphate process, (Parkerizing trademark), the temperatures of the solution are not high enough to affect hardness. I will ask the question why.