Bit off topic but interesting nevertheless.
Is it worth making a sticky topic regarding stainless bolts of prevent misinformation being dispersed?
Someone probably should do a write up on fasteners, including Stainless and High Tensile and why they are not always the most suitable for every job. Fasteners are, after all, some of the 'glue' that holds our cars together
IMPERIAL HEAD MARKINGS
These are most commonly available in Grade 2, Grade 3, Grade 5 and Grade 8. Some of the Cap Head Fasteners go to Grade 10 and Grade 12. Numbers like 4.8 and 8.8 are not used on Imperial fasteners, they are for those below
METRIC HEAD MARKINGS