In the unique situation where you require a 5/8" expansion anchor, for B Desk (see Sheet 13 of the OPM),order these BC45's and BC-90's. They come boxed for use with 20 GRIDLOK  in with a total of 60 pieces, being 40 BC 45's and 20 BC-90's with the larger hole to accomodate these larger than normal expansion anchors.

For use as described in OSHPD OPM 0544