The most common are FH = flat head, PH = pan head, and OH = oval head
A #5 is a little uncommon, it might be a misprint and if so I would guess on a #6 BTW the range is from #0 to a #24 the common ones for assembly are #6, #8, #10 and #12. Size of #4 and below are often used with mounting hardware (hinges etc).
This is an older thread, you may not receive a response, and could
be reviving an old thread. Please consider creating a new thread.
Router Forums
A forum community dedicated to router and woodworking professionals and enthusiasts. Come join the discussion about different types of routing and routers, shop safety, finishing, woodworking related topics, styles, tools, scales, reviews, accessories, classifieds, and more!