Thru-hole counts too
Most of our RoHS discussions focus around surface mount parts: BGAs, GBGAs, QFNs, etc. Such components tend to be the most sensitive to process issues. It is important, though, to not forget about the lowly thru-hole part.
Thru-hole component leads are traditionally plated with solder. Some use other materials like gold or tin, but if yours are solder plated and you need RoHS, make sure you order the lead-free varieints.
Pb and Jelly