DSC Club Member
BSB Star
Bikes: 2009 Ducati Monster 1100s, KTM 890R
Posts: 5,996
Join Date: May 2003
Location: Coulsdon, Surrey...........and hopefully Germany at some point in the future.
Mood: I love the Monster and the KTM & I have my wife exactly where she wants me!
Just use A4 S/S with some copper slip and you will have no problems, most suppliers of S/S will offer either A2 or A4, S/S is not expensive but never use S/S for engine bolts as it has a courser thread than normal metric engine bolts and hence can work loose easier.
I found this out when I bought a set to put on my Jota and was warned about this problem by a very knowlegable chap many years ago, remember that S/S does not have the same tensile streanth as mild steel for such applications like retaining bols etc.
You will have no trouble with A4 on your calipers.