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1. Metric bolt hardness question (score: 1): Author: "Patrick J. Horne" <horne@cs.utexas.edu>; Date: Sun, 23 Sep 2001 16:43:23 -0500 (CDT); What is the difference between a steel bolt with a hardness marked 8.8 and a stainless bolt marked A2.70 (or TH5)? The fan blade bolts came loose on my 67.5 and 3 broke, while the fourth one was 3/4; /html/datsun-roadsters/2001-09/msg00795.html (7,488 bytes)
2. RE: Metric bolt hardness question (score: 1): Author: "Gordon Glasgow" <gsglasgow@home.com>; Date: Sun, 23 Sep 2001 15:16:38 -0700; Metric grade 8.8 is equivalent to SAE grade 5. I think metric 10.8 is equivalent to SAE 8, or maybe that's metric 12.8. I don't know what A2.70 is. Stainless is more brittle than regular mild steel.; /html/datsun-roadsters/2001-09/msg00796.html (8,812 bytes)
3. Re: Metric bolt hardness question (score: 1): Author: "datsunmike" <datsunmike@nyc.rr.com>; Date: Sun, 23 Sep 2001 18:53:48 -0400; 10.8 is the grade 8 equivalent however 12.8 is like ARP bolts which are extra hardened. They are hard to find unless special ordered at a large industrial supplier and of course more $$$$$. Stainless; /html/datsun-roadsters/2001-09/msg00799.html (10,140 bytes)
4. Re: Metric bolt hardness question (score: 1): Author: snyler <marc@animalfirm.com>; Date: Sun, 23 Sep 2001 18:09:29 -0500; I'm looking at my Small Parts catalog section on metals and it looks like "it depends" They all contain chromium (12% minimum) sometimes sulphur, Molybdenum, nickel. There's a high carbon chromium st; /html/datsun-roadsters/2001-09/msg00801.html (8,211 bytes)

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