This could work for small parts storage. There are many small drawer systems [1], but they need shelving. So you need both a shelf system and a drawer system, a

This could work for small parts storage. There are many small drawer systems [1], but they need shelving. So you need both a shelf system and a drawer system, and they usually don't match. 17 inches wide is a common with for small drawer modules, so fitting those into 19 inch racks would work. [1] https://www.uline.com/Grp_523/Parts-Cabinets https://www.uline.com/Grp_523/Parts-Cabinets