Middle Atlantic's HP series rack screws are an excellent choice when mounting rack equipment. The HP series screws are ?" long and available as 10-32 or 12-24 threads for compatibility with your rack enclosure. Each screw has a factory installed nylon washer for convenience. All screws are heat treated for strength and to resist head stripping. This series features an attractive Phillips truss head and is finished in black oxide. The contractor size 500-piece version comes with a reusable plastic storage jar. Cage nuts fit the WRK, MRK and DRK cage-nut style rack rails and are available to fit 10-32 rack screws to accommodate slide out servers.