Hi Guys, Got a question, Why are the four Alllen bolts that hold the top bearing housing on to the upper housing made of ferrous steel and not stainless steel,it seems odd to me to put stainless everywhere else. Especially when they cost ?4 each. 

Thinking about this, would the s/s bolts stretch under load, if this is so other bearing housings would also use ferrous bolts. But they dont.
Thinking about this, would the s/s bolts stretch under load, if this is so other bearing housings would also use ferrous bolts. But they dont.