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 GRIDLOK 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. Note you must separately order GRIDLOK model required by ceiling manufacturer required for the installation- i.e Armstrong, CertainTeed or USG. This product purchase is for clips only. 

For use as described in OSHPD OPM 0544