Threaded Hole Hardware Kit (Includes 50 M6 screws and washers.) Model #: SRCAGENUTS Square hole hardware kit - 50 each M6 cage nuts and bolts Fastens equipment to square hole rack mount rails Compatible with all square hole racks (EIA 310D) A complete line of SmartRack accessories are available to customize your SmartRack to your application. Designed for easy installation and years of reliable service, SmartRack accessories from Tripp Lite are ideal complements to your SmartRack enclosure or open frame rack system. Package Includes 50 pcs M6 cage nut zinc 50 pcs M6 pan head screw 50 pcs PVC black cup washer PHYSICAL Shipping weight (lbs) 1 Shipping Dimensions (HWD/in) 4 x 1 x 6