In reply to Inhambane:
The Fixe classic glue-in didn't fare that well in the tests I did, as the notches in the leg are barely adequate. They also have an exposed weld which isn't ideal for corrosion resistance. Their newer forged one piece PLX glue-in looks good, but it's more expensive.
Raumer look fairly good but I haven't tested them yet, and the Titan Climbing Eterna are the gold standard for extreme corrosion applications, although the lower off options are limited, expensive and not very aesthetic as the softness of titanium means the lower off ring is huge.
Petzl Collinox are very decent but again not cheap. Bolt Products are without doubt the best value bolt on the market, the main downside being the large hole needed. Another advantage is Jim can make them in any length, meaning you can use them even in very soft rock including soft sandstones.
The new EN959 standard has 3 classes of bolt and lower off. Class 2 is for outdoor use where SCC is not expected or been reported. Class 2 = EN1.4401/AISI316 or equivalent as a minimum. SCC is a problem in warm maritime environments, highly polluted industrial zones and in buildings containing swimming pools. This handy map from the UIAA will give you an idea of the sort of locations SCC has been found in: www.theuiaa.org/mountaineering/identifying-the-worlds-corrosion-locations/
I'm currently writing a manual for bolting for the BMC, happy to send you a draft copy if it's any use, just DM me.
Post edited at 14:47