PUSH-FIT 19 INCH RACK CAPTURED CAGE NUTS & BOLTS - 50 PACKM6 16mm Threaded Bolt set for securing equipment in a 19 inch rack, Each set comprises 1x Bolt 1x Captured Nut 1x Plastic Washer, Push-Fit Nut simply pushes into place enabling rapid mounting, Easy to remove if necessary, NOTE: Nut is durable but not steel - DO NOT OVER-TIGHTEN, 1 pack contains 50 sets