I believe the o-ring that the shaft rides in is 009, and the one on the end of the shaft where you use the allen wrench to loosen it is 010. 009 is a buck each and 010 is 1.15. I had emailed small parts on Feb 25 about this when I smoothed out my hammer assembly. Hope this helps.
Sp means small parts here, not smart parts... pretty confusing
And I still don't know what this size means...
On another post, I foud that someone ordered 3/8 and 11/32" o-rings. But is it the inner or the outter diameter???
If anyone placed an order from small parts, could you give me the number (ex: bort-010) of the orings you ordered to replace oring #45 and #46 in the hammer assembly?